Announcing the result of “2nd Japanese Yen Hackathon” using Japanese Yen-pegged stablecoin $JPYC!

7 min readMay 9, 2022

JPYC Inc (Chiyoda-ku, Tokyo, CEO: Noritaka Okabe), which issues and handles Japanese Yen-pegged stablecoin $JPYC, held “2nd Japanese-Yen Hackathon” from April 16th to 24th in collaboration with Scalably Inc (Minato-ku, Tokyo, CEO: Junya Yamamoto) which develops SaaS solution “Ecomedia”, and Everscale Japan which is a blockchain DAO.

This Hackathon is a kind of hackathon using Japanese Yen-pegged stablecoin $JPYC.

Result Announcement of The 2nd Japanese Yen Hackathon

From April 16th to 24th, we, JPYC Inc, Scalably Inc and Everscale Japan, held the “2nd Japanese Yen hackathon” online, a hackathon utilizing $JPYC.

The name “Japanese Yen Hackathon” implies “Extending Japanese Yen with technology to make it easier and more convenient to use”.

This time, we will notice the result of this event and the idea-thon held at the same time.


Official site: Japanese Yen hackathon|JPY × Technology


  • Age Limit: nothing
  • Area Limit: nothing
  • Language when you give a pitch: Japanese(Documents can be written in English)
  • Others: Have a passionate ideas for familiarizing $JPYC


  • Prior-lectures: January 28th (Fri) 〜 April 1st (Fri)
    ※10 sessions in total
    ※We conducted “Japanese Yen Hackathon Pre-test”
  • Application Period: March 1st (Tue) ~ April 20th (Wed)
  • Number of Participants: First 10 teams (First-come-first-served basis)
  • Orientation: April 16th (Sat)
    ※8 days implementation (preparation) period
  • Presentation day: April 24th (Sun)
  • Day of result: April 24th (Sun)
  • Before the hackathon: We held “Hackathon Introductory Lectures”

In the “2nd Japanese Yen Hackathon”, we held an introductory course for hackathon participants to learn about it in advance.

The 10 sessions of the “Hackathon Introductory Lectures” covered a wide range of topics for first-time Web3 app developers, from the basics of ERC-20 to implementation of applications using Solidity, as well as the legal aspects surrounding JPYC.

And it included the “Japanese Yen Hackathon Pre-Test” in which participants were awarded NFT if they passed.

The contents of the introductory lectures for the Hackathon are as follows.

Plus, The contents of the introductory hackathon course are available to anyone without registration.

▼Hackathon Introductory Lectures:

Day1: The orientation and midterm presentation

On the first day of the hackathon, the participants reviewed the contents of the “Hackathon Introductory Lectures,” and after a workshop to discuss and create a “motivating team slogan” for the eight-day implementation period leading up to the presentation, and to discuss the products to be implemented, each team made an midterm presentation.

Photo: a part of midterm presentation

Day1 is on YouTube and everyone can watch it freely.

▼Day1 vid

Day2: Presentation and announcement of the result

On the second day of the hackathon, all teams gave pitches about their products, which were completed after 8 days of implementation.

Each team was allotted 10 minutes to make a presentation on “team introduction”, “objectives, issues and solutions”, “supplemental information on competitors and similar services in the market”, “solution demo” and “possibilities and requirements for future solution development”.

After that, we had 7 minutes for feedback from 4 judges and a Q&A session.

The products presented were full of each kind of problem awareness and ideas for solutions, and many of them were already at a level where they could be deployed as services.

Photo: Presentation time

Day2 is also on YouTube so everyone can enjoy it on YouTube site.

▼Day2 vid

The result

After presentations by the participants and rigid and fair judging by a panel of four judges, $JPYC was awarded to good teams as prize money based on the results.

In this press release, we introduce the proposals and products presented by the top three teams.

Team: Miren-gers

*(Miren means “regret” in Japanese, added to before the word “(ran)gers”)

Under the team slogan of “Let’s make public goods!”, they gave the presentation in two stages, aiming for sustainable activities such as “a plain and steady but useful project = public goods” + “creating a (profitable) mechanism to keep the public goods operating sustainably”.

They demonstrated “JPYC Faucet for Tip bot” (Faucet = the system where tokens are donated little by little like a faucet) as a “public good” to obtain gas fees (network fees) to withdraw “thrown JPYC on Twitter” collected by TipJPYC, which is a bot on Twitter that already works.

Then, they proposed “Public Goods DAO” to support public goods that are modest and difficult to fundraise.

Team: Yen no Shita no Chikara Mochi

Based on their catchy slogan “¥Joy, ¥Power, ¥Rich” (Enjoy, Empower, Enrich), they proposed a service that provides a library that enables easy JPYC settlement for all Web 3.0 services, including overseas services.

In the product demo, they presented a service concept called “NFT Marketplace where you can pay by $JPYC” which is truly a service to “expand the circle of yen”**.

**Team name “Yen no Shita no Chikara Mochi” is punned on a Japanese proverb “縁の下の力持ち (En no Shita no Chikara Mochi)”, and the word “縁 (En)” and “円 (Yen)” sounds really similar. Now, the last sentence makes sense.

Team: Dancing Token

With the slogan “I want to save my favs with JPYC,” they proposed a service that allows users to throw $JPYC in association with the live streaming of the event.

They demonstrated with the Chrome extension “Oshi-Sapo (Supporting your favs)!” showing how the “Oshi-Sapo!” service would work and it would be like on the video screen with a comment when a user sends a tip in $JPYC to a “favs” who is broadcasting on OBS Studio.

Fun project “Idea-thon”

In the “2nd Japanese Yen Hackathon”, we held an “idea-thon” as a fun project at the same time.

This idea-thon was open also to non-engineers who could participate by submitting videos, and in this event they competed on the quality of their ideas utilizing $JPYC.

There were two awards:

The Community Award for the team receiving high ratings from the community

The Judges’ Award for the team getting highest ratings from the judges.

The Idea-thon is on YouTube for everyone to watch.

▼Idea-thon vid

Community Award: Team “Anoaka: The Account We Made That Day”

Team “Anoaka: The Account We Made That Day” got this award with their “Quiz and Earn”.

“Quiz and Earn ‘’ implies the kind of messages and objects that “we don’t aim for playing quizes to earn, we do just for fun and luckily earn money”.

They proposed the Quiz Competition using “Minn-haya (the quiz game app that players have to push the fastest to answer the question)” with $JPYC as a participation fee and prize.

Judges’ Award: Team “Sauna Community with NFT (N-SaCo)”

Team “Sauna Community with NFT (N-SaCo)” proposed an “Automatic royalty distribution system” and it won this award.

This community was created on the occasion of the NFT auction for “Sauna Land” magazine.

Its idea was a practical proposal to use smart contract to solve the complications they faced when allocating the revenue of e-book sales.

About co-sponsors

▼Scalably Inc:

Scalably, Inc. is a community tech company that is developing “Ecomedia”, an automation platform for delivering information about the ecosystem including not only companies but also their affiliates, to the people they want to reach, in order to create “a Community = a society that starts with your likes”.

Using information technology, “Ecomedia” enables international community formation and management. They realize a world where communities and companies meet and connect.

Scalably official site:

▼Everscale Japan:

Everscale Japan is a decentralized autonomous organization (DAO) established in Japan to take charge of promoting Everscale, a public blockchain.

Everscale was launched in May 2020 after the community took over the source code of Telegram Open Network, which is Telegram’s blockchain project that was canceled due to a lawsuit with the US SEC.

This DAO has not conducted any ICOs to date and is completely clear on regulations.

Everscale Japan official site:

▼About JPYC, Inc

JPYC Inc develops, issues and operates $JPYC, the Japanese Yen-pegged Prepaid Stablecoin.

$JPYC is issued as “a prepaid payment instrument for their own business” in compliance with the Japanese law “the Payment Service Act”.

While technically similar in nature to crypto assets, legally it is completely clear to Japanese law.

$JPYCs are currently issued on various public blockchains such as Ethereum and Polygon.

About us

・Company :JPYC Inc

・CEO :Noritaka Okabe

・Location :4th Floor in Otemachi building “FINOLAB”, Otemachi 1–6–1, Chiyoda-ku, Tokyo

・Founded :November, 2011

・Services :Issuing ERC-20 prepaid payment instrument, Consulting on blockchain in general such as NFT technology

・Belongings :Member of Blockchain Collaborative Consortium Japan (BCCC)
Japan Payment Service Association, Type 1 Member
Japan DeFi Association, Regular Member
Fintech Association of Japan, Venture Member

・Audits :Akari Audit

・Official URL :

・Japanese Twitter :

・English Twitter :




$JPYC is the Japanese Yen-pegged Stablecoin which complies with Japanese law.