Mybest, Operator of Product Comparison Service Used by 30 Million Monthly Users, to Host RubyKaigi 2026 After-event with ZOZO, Tenshoku Draft, and TOKIUM on May 13 (Wednesday)

Mybest Inc. (Headquarters: Chuo-ku, Tokyo; Representative Director and CEO: Toru Yoshikawa; hereinafter “Mybest”), which operates the product comparison service “Mybest,” will jointly host an after-event for “RubyKaigi 2026,” held in Hakodate, Hokkaido, from Wednesday, April 22, to Friday, April 24, 2026, with ZOZO Inc. (Headquarters: Chiba City, Chiba Prefecture; Representative Director, President and CEO: Kotaro Sawada; hereinafter “ZOZO Co.”), Livesense Inc. (Headquarters: Minato-ku, Tokyo; Representative Director and President: Taichi Murakami; hereinafter “Tenshoku Draft”), which operates Tenshoku Draft, and TOKIUM Inc. (Headquarters: Chuo-ku, Tokyo; Representative Director: Kenichi Kurosaki; hereinafter “TOKIUM Co.”), on Wednesday, May 13. Background Mybest operates a product comparison service used by over 30 million people monthly. Ruby is adopted for the product's backend and is utilized daily as a core technology supporting the service's growth. As a company that has been supported by the Ruby community for many years, Mybest wanted to continuously contribute to its development and sponsored “RubyKaigi 2026” as a Platinum sponsor. At “RubyKaigi 2026,” held in Hakodate, Hokkaido, from Wednesday, April 22, to Friday, April 24, we exhibited a booth and co-hosted “TOKIUM & mybest Drinkup at RubyKaigi 2026 Day2” with TOKIUM Co. “RubyKaigi 2026” After-event Overview Application/Details: https://mybest.connpass.com/event/392055/ We will hold an after-event jointly with ZOZO Co., Tenshoku Draft, and TOKIUM Co., which sponsored “RubyKaigi 2026,” featuring short presentations by each company's first-time participating engineers, a panel discussion by the four companies, and a social gathering. In the short presentations, young engineers will share their experiences in Hakodate and memorable sessions from a fresh perspective unique to first-time attendees. In the panel discussion, we will frankly discuss the aims of each company's booth design, operational ingenuity (efforts), and unexpected episodes from behind the scenes of the sponsoring companies. There will also be a public presentation slot for general participants, so please share your memories from “RubyKaigi” or recent proud achievements.

・Date: Wednesday, May 13, 2026, 7:15 PM - 9:30 PM ・Venue: Mybest Headquarters (Sumitomo Fudosan Tsukiji Building 6F, 7-17-1 Tsukiji, Chuo-ku, Tokyo) ・Format: Offline only ・Participation Fee: Free (pre-registration, first-come, first-served) ・Capacity: 50 people “RubyKaigi” Details Details: https://rubykaigi.org/2026/ RubyKaigi is one of the world's largest international conferences on the programming language Ruby. It plays a significant role as a programmers' conference showcasing numerous cutting-edge technical sessions, as an engine to gather developers of the Ruby interpreter itself and facilitate discussions, and as a hub for global Ruby community exchange with English and Japanese as official languages. This year, its 20th iteration, was held over three days from April 22 at Hakodate Arena and Hakodate Citizen's Hall. Prominent speakers from Japan and around the world, including Yukihiro Matsumoto, the creator of Ruby, took the stage. Mybest Inc. With the mission of “realizing the best selection experience through the internet,” we develop and operate “Mybest,” Japan's largest product comparison service, used by over 30 million unique users monthly. Currently, we are expanding to 8 other countries and regions besides Japan, aiming to realize the “best selection experience” and change the world. ・Location: Sumitomo Fudosan Tsukiji Building, 7-17-1 Tsukiji, Chuo-ku, Tokyo ・Representative: Toru Yoshikawa ・Founded: October 2016 ・Business: Operation of the product comparison service “Mybest,” which compares and verifies products and services across all genres, including home appliances, daily necessities, cosmetics, and fashion, to support users in making optimal choices. ・Corporate Site: https://my-best.com/company/