Publication of Eruninyo's First Essay 'L-size Days'

On May 21, 2026, KADOKAWA published the first essay collection, 'L-size no Hibi' (L-size Days), by active university student YouTuber Eruninyo.

### Background of Eruninyo's Career

Born on October 19, 2006, Eruninyo began his YouTube activities in 2016 when he was in the third grade of elementary school. He reached 1 million subscribers in October 2024, and the number surpassed 1.05 million as of March 2026. He is now a university student who balances academic studies with his active career as a YouTuber, representing a new generation of creators.

### Book Content

This book was published to commemorate his 10th anniversary in activities and his 20th birthday. It is not a flashy success story but a realistic portrayal of his struggles and growth—from his elementary school debut and his first viral moments to being identified at high school and juggling student council duties with content creation. It also includes group interviews with his family and friends, offering a closer look at his true self through the eyes of those who support him.

### Author's Comment (Excerpt)

'Balancing student life and being a YouTuber was not easy. Even during exam periods, I couldn't stop producing videos because I knew people were waiting for them, and I had to fulfill sponsored requests even when I was busy with student council activities. My 'true profession' is being a student. This book records my 'L-size' days—the everyday life of a student and a YouTuber who keeps moving forward despite doubts and setbacks.'

### Release Commemoration Events

To celebrate the release, events will be held in Tokyo and Osaka.

* **Tokyo:** Book Release Commemoration & 10th Anniversary IN Tokyo * Date: June 27, 2026 (Sat) * Venue: Tachikawa Creative Space * Details/Tickets: https://erun1nyo.bitfan.id/events/18930 * **Osaka:** Eruninyo Book Release Commemoration & 10th Anniversary Talk Show, Autograph & Photo Session in Osaka * Date: July 19, 2026 (Sun) * Venue: Umeda Lateral * Details/Tickets: https://livepocket.jp/e/989nk

### Bonus Information

Amazon.co.jp exclusive purchase bonus includes 'Limited Audio Data' for orders placed by August 31, 2026 (Mon).

FACT BOX

  • Source: PR TIMES
  • Category: News