About

Founder & CEO at Kafkai Giken and Mirakuru Europa, building Kafkai, KaiMail and PuchiDen. Previously founded and sold Xoxzo (telephony API company) to Accrete Inc. Python Software Foundation Fellow, co-founder of PyCon JP & PyCon MY Based in Tokyo, but works remotely. Focused on creating AI tools that solve real business problems. I hope to bring some of the revolution technology continues to give us in a form that is beneficial and understandable to the rest of us.

Badges

Tastemaker
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Gone streaking 10
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Maker History

  • PuchiDen
    PuchiDenInternational calls from your browser. No app, no account.
    Jun 2026
  • KaiMail
    KaiMailCustom domain emails, simplified
    Mar 2026
  • Kafkai
    KafkaiAI SEO Content & Competitor Insights Tool
  • 🎉
    Joined Product HuntJuly 23rd, 2021

Forums

Does PuchiDen handle bank IVR menus and in-call keypad tones?

Rebtel and Google Voice fall short on the one thing that is much needed: reliable in-call keypad tones (DTMF) for IVR menus. Rebtel's own help docs say they don't support toll-free numbers or switchboards, and the dial pad often stops working mid-call. Google Voice has the same problem; keypad presses simply not register with automated systems, which is a dealbreaker when you're trying to reach a bank or a government line.

Does PuchiDen handle this properly? Can you navigate phone menus during an active call, including from a phone browser, not just a laptop keyboard?

Skype shut down a year ago. What do you actually use to call a real phone number now?

Microsoft retired Skype in May 2025. For twenty years it was the obvious answer when you needed to call an actual phone number in another country, whether a hotel, a bank, or your family on a normal landline.

I have spent most of my career in telephony (SMS, SIP, WebRTC), and even I struggled to find a clean replacement. Every option I tried wanted me to install an app, make an account, and accept a tracking pixel, just to place one call. WhatsApp, Signal and LINE only reach other people on the same app, which for obvious reasons don't want to work with one another and there is no help when the number you need to dial belongs to a bank, hotel, lawyer's or a government office.

21d ago

PuchiDen - International calls from your browser. No app, no account.

Skype is gone, and every replacement wants an app install, an account, and tracking just to make one phone call. PuchiDen is the opposite: a public phone for the internet. Open your browser, dial, talk. Reach any real number in 180+ countries (banks, clients, government offices), up to 95% cheaper than carrier rates. No app, no account, no tracking. You pay only for calls that connect. For a limited time: €1 free credit on signup.
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