JapanTech

A Monad is Just a Monoid in the Category of Burritos

Small brunch meetup near Iidabashi for category-theory and functional-programming enthusiasts (Haskell, OCaml, Clojure, Scala).

When
Wed, April 29, 2026 · 11:45–12:45 JST
Where
Hotel Metropolitan Edmont Tokyo, 3-10-8 Iidabashi, Chiyoda-ku, · In person
Region
Kanto (Tokyo)
Organizer
Guidable
Language
EN
Source
Meetup
Summary
TechBrunch returns with a Functional Programming edition: a small, relaxed brunch gathering for people drawn to the mathematical foundations of software. Conversation centers on category theory and functional paradigms — monoids, functors, applicatives, and monads — and how those abstractions actually show up in real codebases. The attendee mix is intentionally cross-disciplinary: developers working in Clojure, Haskell, OCaml, or Scala alongside mathematicians and CS folk who use category theory in research or production. Expect tangents into algebra, graph theory, set theory, and topology rather than a structured talk. Meeting point is the hotel restaurant Beltempo at the Hotel Metropolitan Edmont Tokyo near Iidabashi. RSVP is important — the group may relocate, and confirmed first-timers get their meal on the house.
About the community

TechBrunch is a small, recurring community that gathers over brunch in Tokyo to discuss tech topics in depth. Editions rotate by theme — this one is functional programming and category theory — and the format is conversational rather than talk-driven, with first-time attendees getting their meal comped on RSVP.

#functional-programming#category-theory#haskell#ocaml#clojure#scala#meetup#tokyo