Reazon Holdings

Internet Services · Mobile Games · Digital Advertising · Pet Tech · AI Research · Shinjuku, Tokyo

Reazon Holdings, Inc. is a Tokyo holding company whose group of more than ten companies in Japan and overseas works across games, advertising, blockchain, online content, pet technology, finance and research. Its games include Blue Lock Project: World Champion and Kingdom: Choten. It also produces the YouTube channel NOBROCK TV and runs the miruto smart pet-care devices for cats.

Reazon Capital, its principal investment division, invests the group's own capital in startups and in entertainment, content, deep-tech and Southeast Asian companies. Its research team released the ReazonSpeech Japanese speech corpus in 2023 and the open-source OpenArm robot arm in 2025. The company reported 793 employees as of 1 September 2026.

Can be worked in English
3%
Remote or hybrid
3%
Most requested
Common areas
  • Backend engineering 3
  • Marketing 3
  • Operations 3
  • Business development 2

Measured from the 39 listings Ranked has live for Reazon Holdings. Japanese level, visa signal and skills are AI-graded from each posting and can be wrong — confirm against the employer's original posting before applying.

39

Full-time

Japanese?

Legal

Medium co

JP company

Large co

Manages contracts and corporate records, supports shareholder meeting materials, obtains registration and seal certificates, and prepares mailings, seal requests and stamp-tax checks.

Full-time

Japanese?

Sales

Management

Medium co

JP company

Sales position at Reazon Holdings in Tokyo, Japan. The supplied posting names the role and location but gives no further details about duties, qualifications, salary, or working conditions.

New Grad

English?

Biz Dev

Junior

Medium co

JP company

2027 new-graduate Business Role for Rudel at Reazon Holdings, located in Shinjuku, Tokyo. The listed workplace is inside YOTSUYA TOWER, with work also possible at locations designated by the company.

Full-time

EN preferred

Japanese?

Legal

Compliance

Medium co

Research local regulations, coordinate with authorities and law firms, manage overseas governance and compliance, support M&A, and draft and review domestic and international contracts.

Full-time

Japanese?

Operations

Management

Bonus

JP company

General Affairs position at Reazon Holdings, located in Yotsuya, Shinjuku, Tokyo, with work also possible at places designated by the company. Duties and requirements are not stated.

Full-time

Japanese?

Game Dev

UI/UX

Unity

Unreal

Creates game interfaces, promotional images, and related graphics for internally operated social games, while contributing to art direction and lead design.

Full-time

Japanese?

Unity

Game Art

Art Dir

Game Dev

Lead 3D art direction for social games by defining CG concepts, directing production and quality, coordinating external partners, and creating models, motion, and effects in Unity and Maya.

Part-time

Residents only

Japanese?

Remote

QA

Gaming

Leads QA for social games from development through live operations, assigning testers, planning test work, reviewing features, and coordinating quality improvements.

Full-time

Japanese?

AWS

GCP

DevOps

Linux

Infrastructure Engineer role for work at YOTSUYA TOWER in Yotsuya, Shinjuku, Tokyo, and other locations designated by the company; no specific duties are provided.

Full-time

EN preferred

Japanese?

Network

Security

Support Eng

Information systems role based in Shinjuku, Tokyo, with Reazon Holdings. The source identifies the position but provides no details about duties, qualifications, technologies, or working conditions.

Full-time

Japanese?

Legal

JP company

Medium co

Large co

Plan and manage intellectual property strategy across social games, advertising technology, media, Web3.0 and new ventures, handling patents, trademarks, due diligence and licensing.

Full-time

EN preferred

Japanese?

Recruiting

HR

JP company

Recruitment and HR role at Reazon Holdings in Yotsuya, Shinjuku, Tokyo, with possible work at company-designated locations. The listed Yotsuya stations are a one-minute walk away.

Part-time

Japanese?

Gaming

Game Dev

Operations

SQL

This is a part-time Planner Assistant role with Reazon Holdings. The listed workplace is YOTSUYA TOWER in Yotsuya, Shinjuku, Tokyo, with possible work at locations designated by the company.

Full-time

Japanese?

Biz Dev

Strategy

Gaming

Adtech

Plans, launches, and develops businesses and functions across social games, ad technology, and media, including P&L management, growth strategies, and process analysis.

Full-time

EN preferred

Japanese?

Legal

JP company

Medium co

Handles legal reviews, regulatory research, government responses, finance law, incident response, group governance, and domestic and international contract drafting and review.

Full-time

Japanese?

PM

JP company

Medium co

Large co

Carries out PM work at Reazon Holdings, with the stated work location at YOTSUYA TOWER in Shinjuku, Tokyo, and other company-designated locations.

Full-time

Japanese?

Marketing

Digital Mkt

Medium co

JP company

Digital marketing role at Reazon Holdings in Shinjuku, Tokyo. The supplied posting provides no further details about responsibilities, qualifications, technologies, or working conditions.

Full-time

Japanese?

Digital Mkt

Gaming

Bonus

Medium co

Supports marketing for social games by optimizing media, analyzing user insights and campaign performance, identifying KPI bottlenecks, and coordinating improvements.

Full-time

Japanese?

HR

Management

Bonus

Medium co

Labor Affairs role in Tokyo at Reazon Holdings. The supplied posting identifies the position and workplace but gives no further job details.

Full-time

Japanese?

Adtech

Sales

Marketing

Biz Dev

A 2027 new-graduate role covering sales and marketing at Reazon Holdings. The stated work location is in Shinjuku, Tokyo; further duties and requirements are not provided.

Contract

Japanese?

Gaming

Game Art

Animation

Medium co

Create visual effects for games, applications, and animation projects, design performance-conscious effect data, and coordinate schedules and external partners with development teams.

Full-time

Japanese?

Art Dir

Game Dev

Gaming

Unity

Establishes art direction for existing and new social games, creating visual benchmarks, key visuals and concept art while coordinating schedules, reviews, costs and external partners.

Full-time

Japanese?

Gaming

Game Dev

SQL

HTML/CSS

Plans and operates free-to-play mobile RPGs, covering game and level design, monetization, specifications, data creation, content planning, and KPI and user-feedback analysis.

Contract

Japanese?

Gaming

SQL

Game Dev

Bonus

The Game Planner role covers game planning and accepts candidates without prior experience. The workplace is YOTSUYA TOWER in Yotsuya, Shinjuku, Tokyo, or another company-designated location.

Full-time

Japanese?

Project Mgr

Gaming

Medium co

JP company

Creative Coordinator (Design PM) role in Tokyo. The supplied posting gives no further details about duties, qualifications, technologies, salary, language requirements, or remote work.

Full-time

Japanese?

Gaming

Game Dev

Medium co

JP company

Game Director position at Reazon Holdings in Tokyo; the supplied posting provides no further details about responsibilities, qualifications, salary, language, or working conditions.

Full-time

Japanese?

Gaming

Animation

Game Art

Unity

Create 2D character animations, scenes, and effects for social games and promotional content using Spine and Live2D, while coordinating external production and development teams.

Full-time

Japanese?

Gaming

Project Mgr

Medium co

JP company

Coordinate IP reviews for social games, aligning schedules, communicating rights-holder feedback, directing revisions, and submitting illustration and planning materials.

Full-time

Japanese?

Gaming

Game Art

Unity

Game Dev

Create 3D motion for realistic and SD characters in social games and applications using Maya and Unity, including in-game scenes and animation direction, while coordinating external partners.

Full-time

Japanese?

Game Dev

C#

Unity

Gaming

This listing is for a Unity Engineer. The stated workplace is YOTSUYA TOWER in Yotsuya, Shinjuku, Tokyo, or another location designated by the company; no further role details are provided.

Full-time

Japanese?

QA

Gaming

Management

JP company

Lead QA position at Reazon Holdings, located in Yotsuya, Shinjuku, Tokyo, inside YOTSUYA TOWER and at other locations designated by the company.

Full-time

JP required

EN preferred

Work auth req.

ML

AI

Machine Learning Engineer position in pet tech, based in Tokyo. The supplied posting gives no further details about responsibilities, qualifications, technologies, team context, or working conditions.

Full-time

Japanese?

Backend

AWS

GCP

Adtech

Develop and operate APIs for ad delivery systems, ad-tech products, consumer services, and internal tools, designing for performance, scalability, maintainability, availability, and low latency.

Full-time

JP required

Work auth req.

Mobile

Flutter

Kotlin

Develop mobile applications for miruto’s smart cat-care products, contributing to the design and development of products that help owners monitor cats’ health and daily wellbeing.

Full-time

Japanese?

Backend

Game Dev

PHP

Gaming

Develops and operates backend systems for smartphone social games, including server-side features, administration screens, KPI monitoring tools, and scalable infrastructure.

Full-time

Japanese?

Frontend

JavaScript

HTML/CSS

Gaming

Develops web front ends for smartphone games, building player-facing screens, interactive features, animations and effects while addressing performance, maintainability and reuse.

Full-time

Japanese?

Data Science

SQL

ML

Python

Analyze user data for social-game services, using SQL, Python or R to build reports, BI dashboards, data warehouses and models, then propose and measure business initiatives.

Full-time

Japanese?

SQL

BigQuery

Data Eng

Gaming

Build and operate cloud data platforms for social game operations, connecting production systems, creating data lakes and warehouses, and developing BI dashboards and reports.

Full-time

JP required

Work auth req.

Backend

JavaScript

TypeScript

Develop and operate web and backend systems for IoT pet products, including automated cat toilets, while designing databases and infrastructure on AWS or GCP.