Blog
Rafael Kovashikawa Data Scientist & AI Engineer at FUSE. Writing about AI agents, MCP servers, quantitative finance, and data engineering.
Latest posts I distilled a 1.7B model into a BLS tool-calling agent. Six measurement mistakes in a row, a val-loss trap that was a config bug, a fix that came from changing what the model says rather than how it trains, and a lesson about what happens when your test failures and your usability requirements overlap.
Jul 27, 2026 · {"name"=>nil, "avatar"=>"/assets/images/selfie.jpeg", "bio"=>"AI Engineer @ FUSE. Previously macro quant @ JGP. MIT MicroMasters. Washington, DC.", "location"=>"Washington DC", "email"=>nil, "links"=>[{"label"=>"Email", "icon"=>"fas fa-fw fa-envelope-square"}, {"label"=>"Website", "icon"=>"fas fa-fw fa-link"}, {"label"=>"Twitter", "icon"=>"fab fa-fw fa-twitter-square"}, {"label"=>"Facebook", "icon"=>"fab fa-fw fa-facebook-square"}, {"label"=>"GitHub", "icon"=>"fab fa-fw fa-github", "url"=>"https://github.com/kovashikawa"}, {"label"=>"LinkedIn", "icon"=>"fab fa-fw fa-linkedin", "url"=>"https://www.linkedin.com/in/rkovashikawa/"}]} How we designed a production-oriented multimodal system for medical image annotation and won the December 2025 Google Cloud AI Hackathon.
Jan 9, 2026 · {"name"=>nil, "avatar"=>"/assets/images/selfie.jpeg", "bio"=>"AI Engineer @ FUSE. Previously macro quant @ JGP. MIT MicroMasters. Washington, DC.", "location"=>"Washington DC", "email"=>nil, "links"=>[{"label"=>"Email", "icon"=>"fas fa-fw fa-envelope-square"}, {"label"=>"Website", "icon"=>"fas fa-fw fa-link"}, {"label"=>"Twitter", "icon"=>"fab fa-fw fa-twitter-square"}, {"label"=>"Facebook", "icon"=>"fab fa-fw fa-facebook-square"}, {"label"=>"GitHub", "icon"=>"fab fa-fw fa-github", "url"=>"https://github.com/kovashikawa"}, {"label"=>"LinkedIn", "icon"=>"fab fa-fw fa-linkedin", "url"=>"https://www.linkedin.com/in/rkovashikawa/"}]} Our team built an interactive dashboard analyzing global AI job market trends and skills gaps across 66 countries using Stanford HAI data and World Bank labor indicators.
Dec 8, 2025 · {"name"=>nil, "avatar"=>"/assets/images/selfie.jpeg", "bio"=>"AI Engineer @ FUSE. Previously macro quant @ JGP. MIT MicroMasters. Washington, DC.", "location"=>"Washington DC", "email"=>nil, "links"=>[{"label"=>"Email", "icon"=>"fas fa-fw fa-envelope-square"}, {"label"=>"Website", "icon"=>"fas fa-fw fa-link"}, {"label"=>"Twitter", "icon"=>"fab fa-fw fa-twitter-square"}, {"label"=>"Facebook", "icon"=>"fab fa-fw fa-facebook-square"}, {"label"=>"GitHub", "icon"=>"fab fa-fw fa-github", "url"=>"https://github.com/kovashikawa"}, {"label"=>"LinkedIn", "icon"=>"fab fa-fw fa-linkedin", "url"=>"https://www.linkedin.com/in/rkovashikawa/"}]} technical reflection on how the MCP structures agentic communication
Oct 15, 2025 · {"name"=>nil, "avatar"=>"/assets/images/selfie.jpeg", "bio"=>"AI Engineer @ FUSE. Previously macro quant @ JGP. MIT MicroMasters. Washington, DC.", "location"=>"Washington DC", "email"=>nil, "links"=>[{"label"=>"Email", "icon"=>"fas fa-fw fa-envelope-square"}, {"label"=>"Website", "icon"=>"fas fa-fw fa-link"}, {"label"=>"Twitter", "icon"=>"fab fa-fw fa-twitter-square"}, {"label"=>"Facebook", "icon"=>"fab fa-fw fa-facebook-square"}, {"label"=>"GitHub", "icon"=>"fab fa-fw fa-github", "url"=>"https://github.com/kovashikawa"}, {"label"=>"LinkedIn", "icon"=>"fab fa-fw fa-linkedin", "url"=>"https://www.linkedin.com/in/rkovashikawa/"}]}
chemistry nobel prize offers a profound lesson on scientific progress, with the AI acceleration
Oct 9, 2025 · rafael now I have a youtube API quota to construct the database
Sep 17, 2025 · rafael favicon is a small icon that appears next to your site’s title in browser tabs
Jul 26, 2025 · {"name"=>nil, "avatar"=>"/assets/images/selfie.jpeg", "bio"=>"AI Engineer @ FUSE. Previously macro quant @ JGP. MIT MicroMasters. Washington, DC.", "location"=>"Washington DC", "email"=>nil, "links"=>[{"label"=>"Email", "icon"=>"fas fa-fw fa-envelope-square"}, {"label"=>"Website", "icon"=>"fas fa-fw fa-link"}, {"label"=>"Twitter", "icon"=>"fab fa-fw fa-twitter-square"}, {"label"=>"Facebook", "icon"=>"fab fa-fw fa-facebook-square"}, {"label"=>"GitHub", "icon"=>"fab fa-fw fa-github", "url"=>"https://github.com/kovashikawa"}, {"label"=>"LinkedIn", "icon"=>"fab fa-fw fa-linkedin", "url"=>"https://www.linkedin.com/in/rkovashikawa/"}]} pearson’s ρ drops to zero for X vs |X|—a neat example of hidden dependence.
Jul 22, 2025 · rafael
← Prev ✦ Random Next → Visit ↗ Feed Kagi ↗