| Ja Kanji: | 絶体絶命でんぢゃらすじーさん |
| Ja Romaji: | Zettai Zetsumei: Denjarasu Jii-san |
| Genre: | Adventure, surreal humor |
| Type: | manga |
| Author: | Kazutoshi Soyama |
| Publisher: | Shogakukan |
| Demographic: | Children, Shōnen |
| Magazine: | CoroCoro Comic |
| First: | October 2001 |
| Last: | March 2010 |
| Volumes: | 20 |
| Type: | tv series |
| Director: | Yorifusa Yamaguchi |
| Producer: | Naohiko Furuichi Takeshi Sasamura |
| Music: | Makoto Takou |
| Studio: | Studio Hibari |
| Network: | TV Tokyo |
| First: | April 4, 2004 |
| Last: | March 27, 2005 |
| Episodes: | 51 (5 minutes per episode) |
| Type: | manga |
| Dangerous Jii-san Ja | |
| Author: | Kazutoshi Soyama |
| Publisher: | Shogakukan |
| Demographic: | Children, Shōnen |
| Magazine: | CoroCoro Comic |
| First: | April 2010 |
| Last: | February 15, 2017 |
| Volumes: | 20 |
| Type: | ova |
| Dangerous Jii-san Ja | |
| Director: | Takashi Watanabe |
| Music: | Hyadain |
| Studio: | J.C.Staff |
| First: | July 27, 2012 |
| Last: | November 22, 2012 |
| Runtime: | 30 minutes |
| Episodes: | 2 |
| Type: | tv series |
| Dangerous Jii-san Ja | |
| Director: | Takashi Watanabe |
| Music: | Hyadain |
| Studio: | J.C.Staff |
| Network: | Kids Station |
| First: | October 20, 2012 |
| Last: | December 22, 2012 |
| Episodes: | 10 |
is an adventure manga by Kazutoshi Soyama first published by Shogakukan in CoroCoro Comic in October 2001. The series was adapted as a 51-episode anime broadcast on TV Tokyo from April 2004 to March 2005, which is licensed by Viz Media in North America as Grandpa Danger,[1] and a series of video games.[2] A second anime television series premiered on October 20, 2012.[3]
Grandpa（じーさん, Jhi-san）
Protagonist of this work. A self-proclaimed old man who teaches how to survive the dangers of the world.Yosuke（ようすけ）
Grandpa's grandchild.Principal（校長, Ko-cho-）
The principal of the school that Yosuke attends.Gebe（ゲベ）
Grandpa's pet. Mysterious cat-like creature.Koutei（コウテイ, 校庭）
Principal's dog.Mr.Strongest（最強さん, Saikyo-san）
The strongest uncle in history.