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The stablecoin ESPL uses
* This service is not official content from JPYC Inc.
* “JPYC” is a stablecoin provided by JPYC Inc.
* JPYC and the JPYC logo are registered trademarks of JPYC Inc. (brand guidelines).
Stablecoin × Behavior Change
Why ESPL uses JPYC
A stablecoin on a blockchain — moving sponsorship and promise programmably.
ESPL moves sponsorship, promise, and distribution rules on smart contracts on a blockchain. The unit used for the sponsorship is a stablecoin on a blockchain, like JPYC.
01 / What is JPYC
What is JPYC
For using ESPL, three things are enough.
This isn't an investment-product explainer — only the minimum needed to use the app.
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1 JPYC ≈ ¥1
A “stablecoin” benchmarked to the Japanese yen — it moves in yen, matching intuition.
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Not for chasing price moves
The crypto-asset “gain from price” pattern is not the intended use. The goal is a stable unit of value you can rely on.
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In ESPL, used as the sponsorship
Used as the sponsorship — and as the unit of distribution — for keeping people walking.
02 / Why JPYC
Why ESPL uses JPYC
With the arrival of yen-denominated stablecoins like JPYC, the design of promise and distribution can now drop directly into implementation.
There are four reasons ESPL uses JPYC.
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Yen-denominated, easy to read
1 JPYC moves as roughly ¥1, so staking ¥3,000 of sponsorship reaches the recipient as ¥3,000-equivalent. “How much I staked, how much arrives” is intuitive.
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A unit you can explain in plain Japanese yen
“¥5,000 to a parent”, “¥2,000 to a charity on failure” — these read directly when you talk with family or a charity. The sponsorship and its distribution can be designed in your own words.
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A natural fit for smart contracts
Sponsorship (money) and distribution rules (conditions) run on the same smart contract. It's a design that settles “who receives what, when” in one step, without human intermediation.
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An operational fit for the three behavioral levers
Loss aversion, commitment, altruism — these only work when “the design executes exactly, without being shaken by anyone's convenience”. JPYC + smart contracts fit that execution environment.
03 / In Use
Where JPYC appears
inside ESPL
JPYC is not something you handle day to day.
It moves quietly in four moments, as the unit of sponsorship and distribution.
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The Sponsor stakes the sponsorship
When the challenge is created, the Sponsor stakes the sponsorship in JPYC. “¥3,000-equivalent for a 30-day, 8,000-step challenge”, for example — the amount and the conditions are decided together.
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Held as the challenge's conditions
The sponsorship and the distribution rules (success-case / failure-case recipients) are held on the smart contract. The operator can't rewrite them on someone else's terms later.
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On success → to the success-case recipient
If the step goal is met, the sponsorship auto-distributes to the pre-set success-case recipient — the walker themselves, family, teammates, or a charity.
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On miss → to the failure-case recipient
If the step goal isn't met, the sponsorship auto-distributes to the pre-set failure-case recipient. A refund to the Sponsor, a transfer to a charity, a distribution to another family member — everything happens exactly as set in advance.
04 / Behavior Change × JPYC
Driving the three behavior-change levers
with JPYC
The core of the behavior change ESPL supports is three psychological levers: loss aversion, commitment, and altruism.
None of them move on “understanding in your head” alone. JPYC is the tool that turns each into something that actually moves.
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01 / Loss Aversion
Loss aversion
Use “I don't want to lose this” properly in the design
The moment the sponsorship is staked in JPYC, it leaves your hand. “If I don't walk, it actually leaves me” shifts from head to body.
JPYC makes this implementable: If you don't walk, the staked sponsorship leaves you.
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02 / Commitment
Commitment
Fix the goal not as a declaration but as a contract
The sponsorship and the distribution rules are fixed on the smart contract. “Actually, never mind…” can't move them. That turns a declaration into a promise worth keeping.
JPYC makes this implementable: The moment the sponsorship is staked, the goal becomes a promise worth keeping.
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03 / Altruism
Altruism
Design for someone else, since you can't push hard enough for yourself
The success-case recipient can be family or a charity. Because JPYC is yen-denominated, “¥5,000 reaches a parent” or “¥2,000 reaches a charity” reads as plain meaning.
JPYC makes this implementable: Set family or a charity as the success-case recipient, and the “I can push for someone else” psychology kicks in.
05 / Stablecoin × Behavior Change × AI
Stablecoins on a blockchain
made behavior change implementable
ESPL moves the rules of sponsorship, promise, and distribution on smart contracts on a blockchain. The unit used for sponsorship is a stablecoin on a blockchain, like JPYC. Money itself, and the rules (conditions and distribution), can be handled in the same layer — that's the core of this new infrastructure.
Money moves exactly as designed, without being shaken by anyone's convenience. Automatic execution of sponsorship, promise, and distribution has become real for the first time. Behavior change has moved from something you understand in your head to something you can implement. ESPL is one of the earliest applications.
And what comes next
What's more, AI can't handle cash. In an era where AI is delegated economic activity, stablecoins on a blockchain become prerequisite infrastructure.
By using a stablecoin on a blockchain, ESPL is designed for exactly that era.
06 / For Beginners
Five reassuring points
For readers who feel “JPYC? Blockchain? Sounds hard…”, here are five things to know up front.
With these, you're ready to start ESPL.
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You don't need to know crypto
Two things are enough: “JPYC is used as a yen-denominated sponsorship”, and “a blockchain holds it together”.
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The hard-sounding terms have simple cores
“Stablecoin” and “smart contract” — within ESPL, you can read them as “yen-denominated sponsorship” and “a mechanism that auto-executes rules”.
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Holding or trading is not the point
Holding JPYC isn't the goal. It's a unit that the sponsorship and distribution pass through. Speculating for price gains is not the intended use.
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The app itself is free to start
Download and basic features are free. Just tracking your daily steps costs nothing. JPYC comes in when you want to systemize a sponsorship and its distribution.
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Start with the mechanism, then JPYC
Before stepping into JPYC or blockchain, it's recommended to understand ESPL's three-actor structure (Challenger, Sponsor, Recipient) and the sponsorship flow.
07 / Gas Fees
What gas fees are
When the blockchain runs a process — staking the sponsorship, distributing it, etc. — there's a small fee. That's gas.
ESPL runs on networks like Polygon, so gas typically stays at a few yen to a few dozen yen.
Not an investment cost — a small operational fee for moving the mechanism.
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When the challenge is created
Staking the sponsorship and setting the distribution rules incurs a gas fee of a few yen to a few dozen yen.
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When the sponsorship is delivered or distributed
After the success / failure check, when the sponsorship goes to the set recipient, a similar gas fee applies.
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When step records flow into the challenge
Recording steps itself is free. When the processing that reflects steps into the challenge runs on the blockchain, a gas fee may apply.
When gas occurs and how much — that's all you need to remember.
Recording daily steps costs nothing. The gas that occurs when a challenge moves is smaller than a cup of coffee.
08 / FAQ
Frequently asked questions
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What is JPYC?
A yen-denominated stablecoin; 1 JPYC moves as roughly ¥1. It's not designed for price-gain trading — it's a yen-denominated unit of value you can use predictably.
In ESPL, it's used as a yen-denominated incentive for sponsorship and distribution.
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Why does ESPL use JPYC?
To auto-execute “money-moving rules” — sponsorship and distribution — without human intermediation. On a smart contract, rules and money sit in the same layer, so the design of behavior change drops directly into implementation.
Within that, JPYC is used as a yen-denominated incentive whose value feel matches everyday Japanese yen.
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Can I use ESPL without JPYC?
Yes. Challenges can use other tokens too. A testnet is also available, so you can try it for free including gas.
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How much is the gas fee?
Generally a few yen to a few dozen yen (on networks like Polygon). It occurs when the blockchain processes a challenge creation, a sponsorship transfer, etc.
It's not an investment cost — it's a small operational fee for moving the mechanism.
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Is this different from investment or asset management?
Yes — entirely different. ESPL uses JPYC as a “sponsorship for keeping people walking”.
Going after gains from price increases is not the intended use. The app is not positioned in a speculation context.
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Can a beginner understand this?
The two starting points are enough: “JPYC is used as a yen-denominated sponsorship” and “the blockchain and stablecoins quietly support the auto-execution of behavior change”.
For the full mechanism, see the mechanism page. For the operational flow, see the how-to-use page.
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Where can I obtain JPYC?
JPYC is issued (purchased) via JPYC Inc.'s official service, JPYC EX. 1 JPYC = ¥1, bank transfer only, from ¥3,000, issuance fee-free (bank transfer fees and gas are user-borne).
Account opening takes as little as one minute, with My Number Card-based identity verification using the signature electronic certificate password (Public Personal Identification; no photo upload needed).
Supported networks are Ethereum, Polygon, and Avalanche. Once a receiving wallet address is registered, JPYC is issued.
ESPL does not sell or issue JPYC. JPYC is needed in ESPL only at the moment the Sponsor stakes the sponsorship.
Alternative routes (via CEX, DEX, P2P, OTC), regulation and tax, and operational risks and edge cases are covered in the practical guide to obtaining and redeeming JPYC (Japanese).
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Can JPYC be redeemed back to Japanese yen?
Yes. The issuer, JPYC Inc., accepts redemption (cash-out) of held JPYC to Japanese yen via the official service JPYC EX. The fee is zero (gas is user-borne), from ¥3,000, available 24/7.
After the blockchain transaction is confirmed, the yen is transferred to the registered bank account.
Operational rules that tend to trip up redemption — like “create the redemption reservation first” or “send from the registered wallet” — are covered in the practical guide to obtaining and redeeming JPYC (Japanese).
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What about taxes?
ESPL treats JPYC as a “unit for sponsorship and distribution”, not an investment product. The actual tax treatment varies by user circumstance (individual or corporate, use case, amount, holding period, whether transferred, etc.).
For individual tax decisions, please consult a tax professional. We do not provide tax advice.
For questions not covered here, please contact us.