JapanTech

Tech Brunch Event

A small brunch meetup in Iidabashi on functional programming and category theory, covering monoids, functors, applicatives and monads.

When
Tue, August 11, 2026 · 11:45–12:45 JST
Where
Beltempo, Hotel Metropolitan Edmont, 3 Chome-10-8 Iidabashi, Chiyoda City · In person
Region
Kanto (Tokyo)
Organizer
Guidable
Language
EN
Source
Meetup
Summary
TechBrunch pairs a casual weekend meal with a single technical theme, and this edition takes on functional programming and category theory. The group plans to work through concepts such as monoids, functors, applicatives and monads, and to discuss where those abstractions actually earn their place in software design. The session suits people who write Clojure, Haskell, OCaml or Scala, mathematicians who use category theory in their own work, and developers who are simply curious about the mathematical side of programming. Conversation is expected to wander into neighbouring areas as well, including algebra, graph theory, set theory and topology. The meetup happens over brunch at Beltempo, the restaurant inside Hotel Metropolitan Edmont near Iidabashi. It is deliberately a small gathering, so RSVPs matter: the group may relocate within the venue, and first-time attendees who RSVP and appear on the confirmed list have their meal covered.
About the community

TechBrunch is a small Tokyo group that meets over a meal rather than in a lecture room, with one technical theme per gathering. Attendance is kept intentionally limited so the table stays a single conversation, and first-time attendees who RSVP in advance have their meal covered. Sessions lean theoretical, drawing regulars who enjoy the mathematical foundations of programming as much as the code itself.

#functional-programming#category-theory#monads#haskell#clojure#scala#tokyo