# WHITEPAPER(EN)

## Game Overview

──A serious battle over fully on-chain NFTs.Something no one in the world has ever experienced.The excitement of taking NFTs from others’ wallets.The thrill of having your NFTs at risk of being taken.

Winning will make you cry with joy. \
Losing will make you cry tears.

A revolutionary “Play and Earn” game that will shake your heart from Japan.

Launched on the Ethereum Mainnet, “Isekai Battle” will reinvent the game experience to something “real”──

“Isekai Battle” is a PVP blockchain game in which players battle each other for NFTs (Fragments) to complete a series.

The prototype of fully on-chain games utilizing NFTs, which will be a norm in the future, is realized on the Ethereum blockchain with the best technology available today, taking us into a new era of blockchain games.

\*Isekai Battle has migrated to Ethereum L2 Chain Optimism on Jun. 28, 2024 due to the rising gas fees.



## **Story**

Hundreds of years have passed since the war of the gods ended.\
The people of Turkenista were beginning to return to their peaceful lives.

This is Halnearth in the far east of Turkenista.

A torn book is found in a shrine said to be an ancient ruin.

The Book of Rein, Chapter of Truth, Verse 14.

This was the name given to the pages which contained\
a map of what seems to be Halnearth\
and words that no one could read.

_- When the seven Fragments come together_\
&#x20; _The lost power of the gods will be revived and unleashed -_

The one to decipher the words was from another world.



## **Terminology**

#### **Fragments**

Fragments of SINKI that can be found through Explorations =NFT. There are 7 in each region. (Cannot be sold/bought/transferred)

#### **SINKI(ERC721)**

Godly relics that can be claimed by collecting 7 Fragments. They can be sold to earn ETH.

\*Check the details in each section.



## How to start the game.

1\) Hire Characters at Gina’s bar\
[https://mint.isekai-battle.xyz/](https://mint.isekai-battle.xyz/)

You need at least 3 Characters to play the game.\
\*The initial sale is finished, and now yYou can also purchase them from secondary markets such as OpenSea, etc. \
\*Gina’s bar has been closed on the Optimism chain.

We have a new collection due to migrating to Optimism.

New Collection Page (Optimism)\
[https://opensea.io/ja/collection/isekai-battle-optimism](https://opensea.io/ja/collection/isekai-battle-optimism)

Old Collection Page (Ethereum)\
https://opensea.io/collection/isekai-battle\
\*Do not purchase NFTs from this collection.

2\) Jump into Halnearth!\
[https://app.isekai-battle.xyz/](https://app.isekai-battle.xyz/)



## Character

Players can hire multiple characters.

#### **Character names**

001 Ash                 002 Sala          003 Elfie　　 004 Mito      &#x20;

005 Carabinero  006 Aria           007 Swen        008 Eat      &#x20;

009 Luna             010 Duke          011 Sakuya      012 Kieffer

013 Mia                014 Zack           015 Padma      016 Noel       &#x20;

017 Irina               018 Eliza           019 Denis         020 Kocho

021 Ralph            022 Nova          023Hal



## **Character traits**

Each character has a favorite Weapon “Sword, Two Hands, Fists, Bow, Staff” and Armor “HeavyArmor, LightArmor, Robe”. By matching their favorite equipment, the Weapons and Armor that are equipped to the troops led by the Character will get a stat boost during Battles.

cf.[Battle - Unit power](#unit-power-overview)

#### **Character stats**

ATK: Every 1 point increases the bonus rate of their favorite weapon by 1%.&#x20;

DEF: Every 1 point increases the bonus rate of their favorite armor by 1%.&#x20;

LUK: Every 1 point increases the chances of finding “Seeds” through Exploration.

\*In the actual battles, a random percentage between 1% and the Character’s ATK (or DEF) % is rolled. If multiple Characters have the same favorite Weapon (or Armor), the highest roll will be chosen over the others.

Example:\
If two Characters have Sword as their favorite Weapon, and Character A (ATK 10) rolls 6, and Character B (ATK 20) rolls 3, the higher 6 will be chosen, and the Sword Attack power will be increased by 6%.

#### **Weapon/Armor stats**

Lv1 stats have an expected value of 150 for attack/defense power(the value will be randomly chosen between 100 - 200)

Lv2 stats have an expected value of 175 for attack/defense power (the value will be randomly chosen between 125 - 225)

Lv3 stats have an expected value of 50 for attack/defense power (the value will be randomly chosen between 150 - 250)

\*The random value range, etc., is subject to change.

#### **The definition of Character ID and generation (GEN)**

GEN0   : ID 1 - 5500

GEN0.5: Character ID above 5501 with 0 as the last digit.

GEN1    : Character ID above 5501 with 1-9 as the last digit.

\*ID 1 - 150 will be managed by the operation team for distribution purposes in events.

#### **Special bonuses depending on generation (GEN)**

GEN0　: The cost to fuse and use Seeds is reduced by 10%.

GEN0.5 : The cost to fuse and use Seeds is reduced by 5%.

\*The reduction for using Seeds only applies to that Character, and the reduction for fusing Seeds will be applied by owning 1 character. (The reduction will not pile up and the maximum is 10%)The reduction rate is subject to change.



## Exploration

Select a region on the world map to go on an Exploration. \
You can find Weapons/Armor/Seeds/Fragments(after implemented), and you will need to claim them at the end of your Exploration.&#x20;

The more Characters you have going on an Exploration, the higher your chances are to find each item, and higher level Weapons/Armor. (Weapons/Armor/Seeds will not be taken by other players)

You can select which items (Weapons/Armor/Seeds/Fragments) to claim on the Claim screen.

### **Weapons/Armor**

They are items needed for the Battles for NFTs. The Weapons will be automatically equipped to all troops led by the Characters set in the Attack Unit and the Armor to the troops led by the Characters in the Defence Unit. \
For example, if there are 100 troops in the unit, 100 Weapons/Armor will be equipped automatically with priority to the Character’s favorite equipment and higher level. The total of each stat will be the Unit’s “attack/defence power”.&#x20;

Also, when the Weapons/Armor match the Character’s favorite equipment, there will be a bonus stat boost. Weapons and Armor will break at a certain rate after battles, so you will need to go on Explorations regularly to find more Weapons/Armor.

cf.[Battle - Unit power](#unit-power-overview)

\*You can only hold 200 pieces of Weapons/Armor. We are considering a system that would allow you to increase the limit in the future.

We have a new collection due to migrating to Optimism.

New Collection Page (Optimism)\
Weapons: [https://opensea.io/ja/collection/isekai-battle-weapons-optimism](https://opensea.io/ja/collection/isekai-battle-weapons-optimism)\
Armor: [https://opensea.io/ja/collection/isekai-battle-armor-optimism](https://opensea.io/ja/collection/isekai-battle-armor-optimism)

Old Collection Page (Ethereum)\
Weapons: https://opensea.io/collection/weapons-isekai-battle\
Armor: https://opensea.io/collection/armor-isekai-battle\
\*Do not purchase NFTs from this collection.



## **Seeds**

* You can find Seeds when you have 3 or more Characters going on an Exploration in the world map.
* The total LUK of the Characters Exploring the world map determines the rate to find Seeds.
* There are 3 types of Seeds: “ATK Seed”, “DEF Seed”, and “LUK Seed”.
* ETH will be consumed to fuse and use Seeds.
* Each Character can be fed a maximum of 10 Seeds. (when the Characters are given their first SEED, their levels will increase from 1 to 10)

cf.[Details - Seed fusion](#details-seed-fusion)

We have a new collection due to migrating to Optimism.\
New Collection Page (Optimism)\
[https://opensea.io/ja/collection/isekai-battle-seeds-optimism-1](https://opensea.io/ja/collection/isekai-battle-seeds-optimism-1)

Old Collection Page (Ethereum)\
https://opensea.io/collection/seeds-isekai-battle\
\*Do not purchase NFTs from this collection.



## **Fragment（NFT）**

* There are 7 Fragments in each region.
* You can only own 1 per each Fragment.
* Fragments can be obtained through Explorations and Battles.\
  Exploration: You have a chance to get a new Fragment only when you have 2 or fewer Fragments of the same region.\
  Battle: You can get a Fragment that you do not own by winning a Battle.
* Only 1 Fragment (NFT) per Character can be claimed through a single Exploration. Having more Characters going on an Exploration will increase your chances of finding them.
* Fragments are unique NFTs that cannot be transferred between wallets or traded on secondary markets.
* By collecting 7 Fragments of the same region, you can restore (mint) a SINKI.
* Once the SINKI is restored, the Fragments will be burnt (the number you own will become 0), and you can start collecting Fragments again.



## Battles

The Battles are PVP battles in which you fight other players for Fragments (NFT).\
You can take Fragments (NFT) that you don’t own from other players, but you’re Fragments (NFT) are also at risk of being taken by other players. The balance between the Attack Unit and Defence Unit is crucial.\
After Battles, a certain percentage of the Weapons/Armor used in the Battle will break.\
You can find Weapon/Armor from Exploration.\
cf. [Exploration](#exploration)

#### Battle flow - Attack side

1. Organize the Attack Unit
2. Select the Fragment you want to target.
3. Attack a player who has the Fragment you want.
4. Your attack power and the other player’s defence power are compared in the Battle.
5. If you win, you take the other player’s Fragment, and if you lose, you get nothing.

\*Even if you lose the Battle you initiated, you will not lose the Fragments (NFT) you own.

#### **Battle flow - Defence side**

1. Organize the Defence Unit
2. Other players will attack you (Battles can happen when you are not playing the game)
3. Your defense power and the other player’s attack power are compared in the Battle.
4. If you win, you defend your Fragment, and if you lose, you lose it.

\*If you own a Fragment, other players can initiate Battles even when you do not have a Defence Unit set.

\*Battles can happen when you are not playing the game.

#### **Unit power - Overview**

The power of the Unit is calculated for each battle based on the number of troops in the Unit, equipment collected through Exploration, and Character traits.

#### **Unit power - Number of troops**

The player has 30 troops each in the Attack Unit and Defence Unit. The Characters assigned to the Units each have 10 troops plus an additional 1 at Lv1 or an additional 2 at Lv10 under their command.\
When there are 16 or more Characters in the same wallet, the Units will receive an additional (number of Characters - 15)\*2 troops. (No bonus troops over 31 Characters)

Example 1:\
When a single Lv1 Character is assigned to a Unit\
30+10+1=41 troops

Example 2:\
When 2 Lv1 Characters are assigned to a Unit\
30+1&#x30;_&#x32;+&#x31;_&#x32;=52 troops

Example 3:\
When 5 Lv10 Characters are assigned to a Unit, and the wallet owns 30 Characters\
30+1&#x30;_&#x35;+&#x32;_&#x35;+(30-15)\*2= 120 troops

#### **Unit power - Equipment and Character traits**

In Battles, the troops are randomly equipped with Weapons/Armor that you own.

When the Weapon/Armor matches the Character’s favorite Weapon/Armor, a boost will be given to that Weapon/Armor, so be sure to check the favorite Weapon/Armor of the Characters set in the Units.

#### ATK Bonus

A boost is applied to the favorite Weapons of the Characters in the Attack Unit. For example, if the ATK is 80, a random value between 1 and 80 is drawn for the Battle. This value multiplied by 2% becomes the coefficient added to the attack power of the favorite weapon.

If multiple Characters with the same favorite Weapon are in the Unit, the coefficient from the highest random value will be used.

Example 1:\
If the Attack Unit has Ash (Lv10, ATK 100, Favorite Weapon: Sword) with 42 Lv3 Swords equipped.

* Number of Troops: 30+10+2=42
* Random value of the attack power for a Lv3 Sword: between 150 and 250, 200 for this example
* Random value of the ATK bonus coefficient: between 1 and 100, 70 for this example

Total Attack Power: 200\*42\*(1+70\*2%)=20,160

\
Example 2:\
If the Attack Unit has Ash (Lv10, ATK 100, Favorite Weapon: Sword) and Duke (Lv10, ATK 50, Favorite Weapon: Sword) with 54 Lv3 Swords equipped.

* Number of Troops: 30+(10\*2)+(2\*2)=54
* Random value of the attack power for a Lv3 Sword: between 150 and 250, 240 for this example
* Random value of Ash’s ATK bonus coefficient: between 1 and 100, 40 for this example
* Random value of Duke’s ATK bonus coefficient: between 1 and 50, 50 for this example (the higher value is used)

Total Attack Power: 240\*54\*(1+50\*2%)=25,920

#### DEF Bonus

A boost is applied to the favorite Armor of the Characters in the Defence Unit. For example, if the DEF is 80, a random value between 1 and 80 is drawn for the Battle. This value multiplied by 2% becomes the coefficient added to the attack power of the favorite weapon.&#x20;

If multiple Characters with the same favorite Armor are in the Unit, the coefficient from the highest random value will be used.

Example 1:\
If the Defence Unit has Sala (Lv10, DEF 100, Favorite Armor: Robe) with 42 Lv3 Robes equipped.

* Number of Troops: 30+10+2=42
* Random value of the defence power for a Lv3 Robe: between 150 and 250, 200 for this example
* Random value of the DEF bonus coefficient: between 1 and 100, 70 for this example

Total Defence Power: 200\*42\*(1+70\*2%)=20,160

Example 2:\
If the Attack Unit has ASala (Lv10, DEF 100, Favorite Armor: Robe) and Aria (Lv10, ATK 50, Favorite Armor: Robe) with 54 Lv3 Robes equipped.

* Number of Troops: 30+(10\*2)+(2\*2)=54
* Random value of the defence power for a Lv3 Robe: between 150 and 250, 240 for this example
* Random value of Sala’s DEF bonus coefficient: between 1 and 100, 40 for this example
* Random value of Aria’s DEF bonus coefficient: between 1 and 50, 50 for this example (the higher value is used)

Total Defence Power: 240\*54\*(1+50\*2%)=25,920



## Details - Fragment(NFT)

Fragments (NFT) will be available through “Exploration” and “Battles”. Each region has its own series of Fragments (NFT) you can find.

\*Fragments are NFTs but cannot be bought, sold, or transferred.

#### **Obtaining through “Exploration”**

Check [Exploration - Fragment (NFT)](#fragment-nft)

#### **Obtaining through “Battle”**

There is a limited supply for each Fragment (NFT), and when all Fragments are found through “Exploration”, you can only get them through “Battles”.

The Battles are PVP battles over Fragments (NFT).

You can get a SINKI (NFT), which releases SINN (ERC20), by completing a series of 7 Fragments (NFT) from a region.

Power up your Characters and organize the best Units to collect Fragments (NFT) and get your hands on SINKI!

#### **Completion and SINKI acquisition**

By collecting all 7 Fragments of a region, they begin to resonate. “Break the Seal” to restore the SINKI (NFT) and release SINN (tokens).



## Details - SINKI（NFT）

SINKIs can be restored by “Breaking the Seal” after collecting all 7 Fragments of a region. The restored SINKI can be sold (for ETH) at a fixed price.

\*SINKIs (NFT) cannot be taken by other players through “Battles”.

\*Multiple SINKIs (NFT) can be sold together.

## Details - Seed fusion

The Seeds found through Explorations can be fused into more effective Seeds by using ETH. The more Seeds you fuse, the better their effect becomes, but the cost will also increase.

ex.

“ATK Seed” + “ATK Seed” + ETH =“ATK Seed Lv2-3”\
“ATK Seed” + “ATK Seed” + “ATK Seed” + ETH =“ATK Seed Lv3-5”\
“ATK Seed”× 4 + ETH = “ATK Seed Lv4-6”\
…\
…\
“ATK Seed”× 8 + ETH= “ATK Seed Lv8-10”

\*The specification of fusing is subject to change.\
\*The ETH consumption depends on the GEN of the Character you selected when fusing Seeds. cf. The definition of Character ID and generation (GEN)

## Details - Magic Circle NFT

By owning a Magic Circle NFT, the chances of getting a bonus on the Seed fusion result will increase.\
Having multiple of them will increase the chance even more.

\*The actual increase rate will be announced when the Seed fusion is implemented.

The number of Magic Circle NFts and the chance of getting a bonus on the Seed fusion

0 Magic Circle NFTs｜No bonus: 70% ｜+1: 20%｜+2: 10％\
1 Magic Circle NFT  ｜No bonus: 50%  ｜+1: 30%｜+2: 20％\
2 Magic Circle NFTs｜No bonus: 30% ｜+1: 40%｜+2: 30％\
3 Magic Circle NFTs｜No bonus: 10%  ｜+1: 50%｜+2: 40％\
4 Magic Circle NFTs｜No bonus:   0% ｜+1: 50%｜+2: 50％\
\*Owning more than 4 Magic Circles will not change the bonus effect.

## **Changes upon migrating from Ethereum to Optimism**

* Probability of obtaining a Seed per LUK point: +0.1% → +0.125%
* Maximum number of Weapons/Armor: 120 → 200 \*If the total LUK value of the Exploration Unit is 32, the probability will be the same as the Ethereum version.
* Seed Claim cycle: approx. 7 days (167h) → approx. 3 days (71h)
* Probability of obtaining a Seed with 5 or more Characters on Exploration: 5% → 1%
* Expected number of Seeds obtained with 15 Characters on Exploration: 0.75 → 0.15



#### **About the first sales of the Character NFTs**

~~Up to 50% of the first sale will be used to provide token liquidity.~~

Although the above was the initial plan, changes in our operational structure and legal interpretation led us to us adopting a system where players can earn ETH instead of issuing the SINN token.\
Please note that part of the initial sales was used to cover development costs, so the amount available for distribution is more limited than originally planned.

## Gameplay of operating members

Including an operation test, the operating members will be playing the game.

We will prevent unfair game-playing based on the following three principles

1. Prohibit the use of insider information for self-serving gameplay.
2. Prohibit actions that significantly impede player profits/opportunities
3. Prohibit actions that damage the trust in the operation

### Privacy policy

Please check the following

[https://isekai-battle.gitbook.io/isekai-battle/legal/privacy-policy](https://isekai-battle.gitbook.io/isekai-battle/legal/privacy-policy)



## Isekai Battle Official Website

[https://isekai-battle.xyz/](https://isekai-battle.xyz/)



### Updates

* Jun. 06, 2022 ver.1.0
* Jun. 08, 2023 ver.1.01 Correction of maximum level, typos, and other textual changes.
* Aug. 09, 2022 ver. 1.02
* Jun. 09, 2023 ver. 1.1
* Jul. 01, 2024 ver. 1.2
* Jun. 06, 2025 ver. 1.3



## IB Project Team

#### Otaku Coin Association

<div align="left"><figure><img src="https://2011927046-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FAQc0mDLZzZ1E4mE1AnlI%2Fuploads%2FaT0ZNaavztCaHMlEzlWu%2F%E3%82%AA%E3%82%BF%E3%82%AF%E3%82%B3%E3%82%A4%E3%83%B3%E3%83%AD%E3%82%B4.png?alt=media&#x26;token=4ec04385-db90-4e69-a87e-a0fc9b37b434" alt=""><figcaption></figcaption></figure></div>

Since December 2017, the Otaku Coin Association, including its predecessor, the Otaku Coin Preparatory Committee, has been working for the development of anime culture, aiming to introduce, spread, and utilize blockchain technology within the anime industry in order to spread Japanese anime culture to the world. As part of our activities to spread anime more globally, we have also conducted interviews with anime studios in multiple languages through multiple media outlets. We keep on making steady efforts such as planning and leading a “Future created by the world’s most notable anime studios” in collaboration with global anime news sites, including the anime information site “Anime!Anime”, “Tokyo Otaku Mode” with over 20m Facebook followers, and “Bahamut”, the leading animation news site in Chinese-speaking countries, and conducting interviews with over 15 anime studios that are not often highlighted in the anime production process, including their thoughts on anime production and behind-the-scenes stories about their work.

[https://otaku-coin.com/](https://otaku-coin.com/)

#### Tokyo Otaku Mode Co. Ltd.

<div align="left"><figure><img src="https://2011927046-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FAQc0mDLZzZ1E4mE1AnlI%2Fuploads%2FpXLggIHeXQQL6UrzR72Y%2Ftom_logo_r_400x400.jpg?alt=media&#x26;token=c1c24b21-dba5-40c8-a6f6-d33b1261af65" alt=""><figcaption></figcaption></figure></div>

Tokyo Otaku Mode strives to bring the Japanese “Otaku Culture” of anime, manga, and games to the world. We introduce Japanese pop culture overseas through mediums such as our Facebook page with over 10 million Likes (as of Jul. 2021). We also run an e-commerce service delivering Japanese anime goods overseas, designing original merchandise, delivery agent service to support cross-border e-commerce, translation service, and other services both in and out of Japan.

[https://corporate.otakumode.com/en-us/](https://corporate.otakumode.com/en-us/)

\
