# Lunatan: 10,000-nen no Himitsu
*Also known as: ルナたん～巨人ルナと地底探検～*

## Facts
- Format: ONA
- Status: concluded
- Year: 2017
- Season: SPRING

## Renewal Score
**Lunatan: 10,000-nen no Himitsu** has a **13% renewal probability** on Courcast (confidence: 48%) as of 2026-06-03.

## Synopsis
In the anime's story, there was a prospering civilization thanks to giants called Luna who once brought the energy known as Mana. However, a giant tsunami struck the world and destroyed the civilization. The story takes place underground 10,000 years after the tsunami hit. The main characters are Mokugyo (voiced by Katsuyuki Konishi), a fish named with plant life growing from his back, and a talkative creature named Toriiruka (Tomoko Kaneda). The lonely, needle-covered animal named Harry (Kazuto

## About Courcast
Courcast forecasts anime renewal probability using daily signals from streaming platforms, fan communities, and industry sources. Each CourScore (0–100) reflects fandom momentum, streaming performance, source material runway, and franchise history.

- Full details: https://courcast.com/title/lunatan-10-000-nen-no-himitsu-spring-2017
- API: https://courcast.com/api/public/titles/lunatan-10-000-nen-no-himitsu-spring-2017
- About Courcast: https://courcast.com/about

*Last updated: 2026-06-03*