Takuma Hanatani (@potato4d)

  1. Engineering Manager / Senior Front-End Engineer at LY Corp.
  2. CEO at ElevenBack LLC.
  3. Maintainer at Vue.js JP docs / Nuxt.js official module

I currently work as a lead the front-end team at LINE Corporation(Tokyo) and CEO of ElevenBack LLC.

Currently, as an Engineering Manager, I am leading the product n the HR domain(LINE Sukimani).

I also have a strong interest in the User Interface, so I often do User Interface design on the side.

I'm always open to requests for user interface design work :)


LY Corp. (2023/10 ~ )

He has been working on the front-end development of HR services as well as organizing multiple teams in the product UI development organization.

ElevenBack LLC. (2019/09 ~ )

As CEO, he is responsible for service operations, project management and engineering.

LINE Corp. (2018/12 ~ )

As the leader of the Front-End Advocates team, he is responsible for solving cross-cutting tasks.

I lead projects such as recruiting, developing engineering guideLINEs and launching in-house projects.

Freelance (2017/07 ~ 2018/12)

As a freelance software engineer, I've been developing web applications with a focus on JavaScript, Qiita with Ruby on Rails at Increments inc., and various services at ROXX inc. (now SCOUTER).

pixiv, inc. (2017/04 ~ 2017/07)

As a software engineer, he worked on new projects such as Pawoo Music.

Products (latest 3 products)


A product released as ElevenBack LLC. A feedback system to accelerate knowledge sharing in the engineering community.

Nuxt.js / Tailwind / Node.js / Google Cloud Platform / Firebase



Personal product. This is an image-recognition-based Pokémon match analysis tool, which is used for more advanced mathematical calculations of win rates.

Nuxt.js / Tailwind / Node.js / Firebase



Personal product.It provides a more comfortable environment for using YouTube Music, developed by Electron.



And more

Open Source

  • Vue.js JP document - Maintainer
  • React.js JP document - Ex-Maintainer
  • @nuxtjs/dayjs - Maintainer
  • nuxt-basic-auth-module - Author


  • NestJS Japan Users Group - Co-Organizer
  • UIT / UIT meetup Fukuoka - Co-Organizer
  • FRONTEND CONFERENCE 2017 - Organizer
  • Vue.js Fes Japan 2018 - Staff
  • Vue.js Japan User Group / WordBench Kyoto - Ex-Member