Yicheng Xian (Kan)

Hi, I'm Kan 👋

I'm based in Japan and work in AI. I love building fun AI apps, trying out new ideas, and sharing what I learn from work and life.

Work

now
Microsoft
Senior AI Architect
Office of the CTO
2026 to now

I help enterprise customers across APAC ship AI, mostly in Japan and Korea.

Recent projects
  • Coding agentFor a Japanese SI company
  • Agent governance systemFor a Korean telecom company
  • Information extraction agentFor a Korean manufacturer
  • Private company analysis agentFor the U.S. office of a Japanese financial company
KPMG FAS
AI Engineer
AI Transformation Department
2025
  • I made our internal M&A RAG system much more accurate
  • I built internal business agents, like one that creates PowerPoint decks automatically
JAPAN AI
AI Engineer
Research Team
2024 to 2025
  • I did everything for our RAG accuracy, from building the benchmark to improving the whole pipeline. We reached very high accuracy, on par with major cloud vendors (press release ↗)
  • I built agents for our Agent Store
Hitachi Consulting
AI Consultant
Technology Strategy Department
2023 to 2024
  • I delivered AI agent PoCs for enterprise clients
TIS
Data Scientist
Data Analytics Department
2022 to 2023
  • I built ML models for enterprise customers, mostly NLP

Beyond work

I wrote a book 📖

「AI・LLMの実務で使える RAG精度改善」

A practical book on making RAG more accurate in real projects.

🏆 It hit #1 on Amazon's AI new release chart

See it on Amazon ↗

I play Kaggle 🏅

I've been playing Kaggle for many years. Data mining competitions are my favorite.

I'm a Kaggle Master, and my best global ranking was in the 500s.

My Kaggle profile ↗

I write blog posts ✍️

On Qiita I share new things I find in AI, and anything new and fun I'm playing with.

My posts get about 300K views a year.

Read it on Qiita ↗

Side projects

NovelWander

A learning project from a while back. It's mostly about AI roleplay novels.

It got about 500 users. Hardly anyone reads it now and I've stopped maintaining it, haha.

novelwanderai.com ↗

GENIAC LLM pretraining

An LLM pretraining project backed by Japan's Ministry of Economy, Trade and Industry (METI). I joined as a member of the model team, and we trained a 14B MoE model.

About the project ↗

Languages

I'm Korean Chinese and came to Japan pretty early, so I speak four languages.

안녕하세요
Korean
你好
Chinese
こんにちは
Japanese
Hello
English

Life

Gamer at heart 🎮

When I'm not working, I'm probably playing games. I love chess and other strategy games.

My favorite of all time is TFT (Teamfight Tactics). Always happy to talk comps.

Book me, let's talk ☕

AI agents, working in Japan, or even TFT. I'm happy to chat.

Click to book →