double jump tokyo announces partnership with COINJINJA for NFTPLUS game titles to participate on their rebranded NFT marketplace, “tofu NFT.”

Kyoko Ueno
Nov 24 · 6 min read

double Inc. (Headquarters: Shinjuku-ku, Tokyo, CEO: Hironobu Ueno), a blockchain technology solution provider for large-scale enterprises, announces partnership with COINJINJA Co., Ltd. (Headquarters: Koshigaya City, Saitama, Representative Director: LeLe Xu), a digital media and information services provider for the crypto assets and blockchain technology communities. COINJINJA recently rebranded NFT marketplace “tofuNFT,” a modern designed multi-chain NFT marketplace for GameFi and collectibles.

To celebrate our partnership, we will be giving out NFT gifts on the tofuNFT marketplace for the NFTPLUS participating game titles running on Polygon.

■List of NFTPLUS game titles participating in tofuNFT marketplace:
・My Crypto Heroes (MCH):
・My Crypto Saga (MCS):
・Contract Servant:

*Contract Servant is not on the Polygon chain, so they will participate when tofuNFT is compatible with Ethereum.

*About Polygon (Matic):
Polygon is an eco-friendly blockchain network that aims to create a multi-chain ecosystem connecting Ethereum-compatible blockchain networks, aggregating scalable solutions. Its network realizes low gas fees and high-throughput while ensuring security by applying the sidechain technology Plasma as an Ethereum scaling solution. With its adoption of the Proof of Stake (PoS) consensus mechanism, the gas required to generate NFTs is 1/1000 of Ethereum and environmentally friendly.

■Background on Partnership
With the rapid growth of the NFT market in 2021 and interest in blockchain games exploding, gas fees on Ethereum have been soaring. They are becoming a significant challenge for user adoption. In addition, the ecosystem for blockchains other than Ethereum is expanding rapidly, and the need for multi-chain support has been increasing in blockchain games as well.

TofuNFT has a large audience globally and has revamped its marketplace by implementing user-friendly UI and new features to accept various crypto-asset payments and support multiple chains and languages.

Their marketplace is focused on GameFi and blockchain game collectibles, and at DJT, we hope that more global game users will enjoy our game titles participating in NFTPLUS.

We will continue collaborating with tofuNFT for other projects to develop the community and further expand the industry’s growth.

Campaign Details

■MCH x tofuNFT Campaign

・ 10,000 MCHC will be evenly distributed to those who purchased MCH NFTs on the tofuNFT marketplace during the campaign period.

・Campaign period: 2021/11/24 16:00–2021/12/31 23:59 (Japan time)

* Check out MCH’s official Twitter account ( for more information!

■CryptoSpell x tofuNFT Campaign

・Follow NFTPLUS and tofuNFT’s official Twitter account and make retweets, and Crypto Spell collaboration NFT cards will be airdropped on a first-come-first-serve basis.

* Check out Crypto Spell’s official Twitter account ( for more information!

■CHOJO x tofuNFT Campaign

・During the campaign period, there will be an airdrop for users who add their CHOJO NFTs for sale on the tofuNFT marketplace. Users will have a chance to receive an autographed CHOJO NFT on a first-come-first-served basis.

・Follow NFTPLUS and tofuNFT’s official Twitter account and make retweets, a randomly selected user will have a chance to win the physical paper copy of the autograph.

* Check out CHOJO’s official Twitter account ( for more information!

■MyCryptoSaga x tofuNFT Campaign

・During the campaign period, 30 “Sylph” NFTs will be airdropped to randomly selected users who add MyCryptoSaga NFTs for sale on the tofuNFT marketplace.

Also, 20 “Sylph” NFTs and 50 “Billi-ken” NFTs will be airdropped to randomly selected users to add NFTs from any participating NFTPLUS game titles (listed above).

* Check out MyCryptoSaga’s official Twitter account ( for more information!

tofuNFT x NFTPLUS Games Campaign

・During the campaign period, new users who register for the NFTPLUS game titles (compatible with Polygon) and use the invite code “tofuNFT,” will have a chance to win the tofuNFT campaign NFTs.

* Check out tofuNFT’s official Twitter account ( for more information!

Please also follow us on the NFTPLUS official Twitter account ( Campaign details will be also announced and on the website URL below.

About tofuNFT

In addition to BSC and Polygon, tofuNFT will support various EVM compatible chains such as Ethereum, Avalanche, Fantom, Astar (Polkadot), and Layer 2 solutions such as Arbitrum and Optimism soon. tofuNFT rebranded to their new name last month as they completed localization to Japanese, revamped their UI to a modern design, and shifted their focus on supporting multi-chain and blockchain games (BCG).

In addition, to commemorate the release of the Japanese version of tofu NFT, they will collaborate with the NFT artist Onigiri Man for its new NFT release, “Tokyo Pop Girls Collectibles,” on December 3rd, 20:00 JST.

▶ ︎Sale Page:

(*) According to DappRadar.

Features of tofuNFT marketplace
tofuNFT is a modern designed multi-chain NFT marketplace for blockchain games (BCG) and collectibles. Some of the features are:

・Supports multiple EVM compatible chains
・Advanced filters for metadata and attributes
・Display of rarity rankings of each collection
・Payment in multiple ERC20-based cryptocurrencies

The marketplace has over 12 million page views per month, supports ten languages, and users across 193 countries/regions access the website. Currently, the United States, Brazil, and Indonesia are the top three countries accessed by users, and tofuNFT will continue to aim to develop a user-friendly marketplace for users not only in Japan but all over the world.

* Only NFTs with original smart contracts can be listed, and minting on the platform cannot be performed.


If you are interested in partnering or joining the NFTPLUS program, please email us at

1.Blockchain Game Development Support Business
DJT provides a technology solution to partners in the gaming and entertainment industries to help them successfully incorporate blockchain technologies into their games and products. We offer an end-to-end solution for smart contracts and APIs for various systems required for developing blockchain games. We also provide the infrastructure needed to build a community, market the apps/games, and support multiple wallets and marketplaces.

2.NFT Solutions for Enterprises
DJT provides a one-stop solution for businesses that want to create their own digital collectibles. Our services include formulating a strategy, product design, UI/UX design, development (coding), and blockchain technology consultation.
We consult with our clients to understand their goals for developing an NFT service and provide the optimal solution that meets their needs.
In addition to offering services to help businesses issue their original smart contracts, we also provide insights for the secondary sales distributions of NFTs and processes required for accounting for publicly listed companies (in Japan or other regions).

COINJINA released its cryptocurrency investment management app (aka CoinView) in October 2017 and has over 1 million downloads. The app has product features such as crypto-asset portfolio management, wallet function watchlists, market data & information, news from worldwide, secure trading via API on multiple exchanges, and more.

・About double Inc.
Founded in 2018, double is the leading startup in Japan that specializes in developing blockchain games and providing NFT solutions for enterprises. It has developed popular blockchain games such as “My Crypto Heroes” which achieved top №1 rankings for ETH transactions. DJT also operates NFTPLUS, its blockchain and NFT solutions services, and “N-Suite” its enterprise NFT management software.

Representative: Hironobu Ueno
Headquarters: 4–34–7 Nishi-Shinjuku, Shinjuku-ku, Tokyo




double jump.tokyo株式会社のブログです。価値のあり方を変える”ブロックチェーン技術”を用いてゲームの未来をリビルドしたい。RE-BUILDING THE FUTURE OF GAMING WITH BLOCKCHAIN TECHNOLOGY!

Kyoko Ueno

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double jump.tokyo株式会社のブログです。価値のあり方を変える”ブロックチェーン技術”を用いてゲームの未来をリビルドしたい。RE-BUILDING THE FUTURE OF GAMING WITH BLOCKCHAIN TECHNOLOGY!