Japan is much further ahead in real AI deployment than most people realize. Today we talk with David Ha, CEO of Sakana AI, Japan's clearly most valuable, and arguably most innovative, AI startup, and he explains how Japanese enterprises are using AI in production environments today. We talk about selling advanced software to conservative enterprises, how Sakana is customizing existing LLMs to fit Japanese sensibilities, and why smaller, more flexible routing models will likely win out over the massive, expensive frontier models. David also shares some great advice for anyone starting a startup in Japan. It's a great conversation, and I think you'll enjoy it. Show Notes When it's best build for Japan instead of (or before) going global How to raise money overseas as a KK and raise large rounds in Japan It's actually very easy to start a startup in Japan Sakana AI's three-stage go-to-market strategy The tradeoffs between B2B and B2C strategies in Japan How to drive AI adoption in the Japanese enterprise Designing AI workflows that prevent users from outsourcing decision making Why routing models will win in the market over frontier models What "data sovereignty" actually means in practice in Japan How Sakana AI is adapting existing models to make them reflect Japanese sensibilities David's best advice to founders in Japan Links from the Founder Everything you ever wanted to know about Sakana AI Follow them on Twitter @SakanaAILabs Connect with Sakana on LinkedIn Follow David on Twitter @hardmaru Leave a comment Transcript Welcome to Disrupting Japan, Straight Talk from Japan's most innovative founders and VCs. I'm Tim Romero, and thanks for joining me. To say that AI is hot right now understates the mania. AI startups accounted for over 60% of global VC investment in 2025, and things are on track to be even more AI-focused this year. And while investor and media attention remain stubbornly focused on the U.S. and China, things are moving surprisingly fast here in Japan, although things are moving in a slightly different direction. Today we sit down with David Ha, the co-founder and CEO of Sakana AI, Japan's most valuable and arguably most innovative AI startup. Now this episode's a bit longer than usual, but it is well worth your time, because by the end, you'll understand why the frontier model companies, the open AIs, the Anthropics, might be pursuing a flawed and very expensive strategy, and why there's a real chance for Japan to be a global leader here. In fact, as David explains, enterprise AI adoption in Japan is far more advanced than most people realize. And we're talking about actual production deployments here, not just POCs and press releases, but actual daily use. Now David and I talk about raising capital from both Japanese and foreign VCs, the global importance of AI sovereignty, the best way to drive AI adoption in large conservative Japanese companies, and why AI use in Japan is more widespread than you probably expect. But you know, David tells that story much better than I can. So, let's get right to the interview. Interview Tim: So, we're sitting here with David Ha, the co-founder and CEO of Sakana AI. So, thanks for sitting down with me. I really appreciate it. David: Awesome. Yeah, it's actually really great to have a chat with you, Tim. I mean, as you know, I've been following your podcast for more than a decade before I started a company. Tim: I mean, I love to hear that. I honestly do. Nothing makes me happier. David: Yeah. I mean, I have no idea that I would start a company like 10 years ago. Tim: Let's start with the founding, because the Sakana AI team is really an interesting test case in Japan, I think. So, the founding team itself, it's a mixture of foreigners and Japanese. Tell me about it. Tell me how it came to be, how the three of you got connected and thought this was a good idea. David: It's a really unique, I would say, experiment. I founded this company a little bit less than three years ago. It's myself, David Ha, and Llion Jones, my colleague at Google, who was one of the co-inventors of the transformer architecture, the T in ChatGPT. And when you start a company in Japan, it cannot just be two foreigner guys, especially if you want to be the frontier AI company in Japan. But luckily, I was able to recruit my friend Ren Ito, who used to work at Mercari. And he was sent to Mercari Europe as well to run Mercari, one of the original unicorns. Tim: So, how did you know Ren? David: We worked together at different startup events before. Earlier, also, I worked at another startup briefly called Stability AI. At that time, Ren was working in the UK for that company, and I was working as a contractor remotely in Japan. So, we connected there. Tim: And you were kind of like, hey, I've got a better idea. David: Yeah, something like that. The best way to meet co-founders and colleagues is when you're working at other startups. And when you're working at other companies. Tim: I...
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