PHP-pegged settlement infrastructure for B2B cross-border payments 🇯🇵→🇵🇭 on Solana. @Colosseum_io Hackathon 2026 · mentored by @SuperteamJapan
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Joined May 2026
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Japan to the Philippines moves billions a year in cross-border payments, most of it through banking rails that are slow and manual.
We're building PHP Settlement Layer: B2B infrastructure for that corridor, on Solana.
Public build log starts here. Devnet deployment, test coverage, and a dashboard that makes the settlement layer invisible to the people actually sending the payment.
Building in public through @Colosseum_io's World's Fair hackathon.
🤖 Made with AI
RPC infrastructure is the thing you don’t think about until you’re staring at rate limits at 2am.
A year of Helius free for Superteam Japan members. If you’re building on Solana and haven’t claimed this, go do it.
🎁特典内容
・ビルダー向け特典：Heliusのデベロッパープランが1年間無料
・スタートアップ向け：Heliusのビジネスプランが3か月間無料
さらに @SuperteamBlack に所属するチームは「Helius Startup Launchpad」を利用可能。
@mert から直接サポートを受けられます🤯
B2B stablecoin payments: around $226 billion annually, up 733% year over year.
That's the macro trend. Japan to the Philippines is one corridor inside it, and the settlement layer underneath is still mostly manual.
Japan’s three largest banks just completed a joint yen stablecoin pilot for cross-border corporate payments, under FSA supervision.
Worth reading the detail. The token is yen-denominated, and the pilot moved money between one company’s Japan office and its overseas offices.
That solves the issuance leg. The recipient still needs local currency at the other end.
That last leg is the one we’re building.
LATEST: 🇯🇵 Japanese megabanks SMBC, Mizuho, and MUFG completed a proof-of-concept for jointly issuing a yen stablecoin and using it for cross-border payments.
ALT Logo of MUFG Bank. The design includes a red circle with a smaller red circle inside, followed by the letters "MUFG" in gray.
ALT A stack of gold coins with the yen currency symbol is surrounded by various denominations of Japanese yen banknotes.
If you've shipped a stablecoin payment product, what broke first in production that testing never surfaced?
Asking before we find out the hard way.
Just submitted our project to the @AdevarLabs Security Sidetrack on @superteamearn for @Colosseum’s Crypto World’s Fair Hackathon
Excited for the chance to receive a full security Pre-Audit for our project.
80% of remittances to Latin America used to start as physical cash in a store.
Félix Pago rebuilt that flow as a WhatsApp conversation, with stablecoins doing the moving in the background, invisible to the user.
Same principle behind what we’re building: the chain should never be the thing the client sees.
Corpay moves money across 200 countries in 145 currencies.
Their take on what stablecoins actually fix for B2B: not the cost, the 24/7 availability.
Same thing we’re building toward, a corridor that doesn’t wait for banking hours.
PHP Settlement Layer retweeted
今回のColosseum Hackathon、本気で入賞を狙う日本の21チーム👇
Tennto @happy_tennto
AML & fraud-prevention for Agents
unloop @unloopsol
Upwork For AI Agents
wrapsynth @agentheights
Monero DeFi Infrastructure
CapturGO @captur_go
Physical AI Data Network
MineX @MineXsol
Solana in Minecraft
BENTO @bento_guard
Checks before your AI spends
Daiko @DaikoAI
Group-trading App. Upgrade Your Cabal.
CatScope @CatScope_io
Run your bot inside validators
PHP Settlement Layer @PHPRail
Philippine payments without the dollar
JPY DeFi @JPYDeFi
JPY Stablecoin, SOL-Backed and Olympus-Inspired
Trade Fighters @TradeFighters
Social edge for traders
Subly @subly_fi
Your agent lives off interest
Effisend @Effisend_
Agentic commerce OS for venues
sampo @sampo_jp
Earning experiences for 8billion people
CollectiblesAR @CollectiblesAR
Summon your tokenized collectibles
Manic Trade @ManicTrade
0DTE Markets, Rebuilt Onchain
Wylls @wyllsOS
Civilization, one save for everyone
MangaNow @manganow_ai
Make manga from anything
Seasonals @seasonals_app
Calendar that runs your DeFi
BONDA @bonda_ros
Just cherish. Safeguard living memories.
FatCat @FatCatTrading
Self-custodial Solana trading on LINE/TG
Stablecoin payroll and cross-border settlement aren't a thesis anymore, they're shipping.
Deel went live with stablecoin wallets across 80 markets this year.
Bitso runs $80B a year in cross-border volume, betting on local-currency stablecoins for the same reason we are.
Different corridors. Same shift, happening everywhere, including ours.
🤖 Made with AI
Attended Superteam Japan's Pitch MasterClass.
Sofian Meguellati on what actually makes a hackathon pitch land.
One thing sticking with me: don't leave the deck for the last minute. Rehearse the pitch video enough times that it comes out natural, not memorized.
@SuperteamJapan @depitchsofian
Different corridor than ours (Hong Kong to Singapore), same underlying problem we're working on for Japan to the Philippines: the settlement layer, not the wallet, is where the friction lives.
New episode of Bits to Bricks with @amiravalliani
@darenguo, co-founder of @reapglobal, talks about how they originally set out to digitize the cross-border payments in Hong Kong and Singapore, and stablecoins became a necessity for that idea.
Check out the full episode 👇
PHP Settlement Layer retweeted
日本→フィリピンの機関間決済を、現在の遅くて高い金融網からSolanaに置き換えるB2Bインフラです。
シークレットで動いていたプロジェクトがとうとう公開されました。
Japan to the Philippines moves billions a year in cross-border payments, most of it through banking rails that are slow and manual.
We're building PHP Settlement Layer: B2B infrastructure for that corridor, on Solana.
Public build log starts here. Devnet deployment, test coverage, and a dashboard that makes the settlement layer invisible to the people actually sending the payment.
Building in public through @Colosseum_io's World's Fair hackathon.
All 8 program instructions tested on Solana devnet, happy path and negative path.
Mint, burn, freeze, unfreeze, pause, unpause, and the rest, each one covered.
