Is Black Jack 21 good to watch with a friend?
A quiet night. Black Jack 21 is a TV series from Spring 2006 by Tezuka Productions Co., Ltd.: 17 episodes, about 6.8 hours in total, finished, 7.49/10 across the listing sites.
Watching it together: a quiet night. Tagged thriller, tragedy and not comedy: this wants attention and the right mood, not background chatter. Rule: heavy drama or psychological tags without comedy → quiet night.
This verdict comes from rules over the title's format, length and tags, not from a review — the rule that fired is named above.
The facts
- Type
- TV series
- Episodes
- 17
- Episode length
- 24 min
- Total time
- about 6.8 hours — a weekend
- First aired
- Spring 2006
- Status
- Finished
- Studio
- Tezuka Productions Co., Ltd.
- Score
- 7.49/10 across the listing sites
- Tags
- action, adventure, manga adaptation, crime, cyberpunk, detective, drama, episodic, friendship, mystery, revenge, shounen, thriller, tragedy, violence, workplace
Data from anime-offline-database (ODbL) as of 2026-07-04; the score is the median of the scores the anime listing sites give it, on a 1–10 scale.
Do you and a friend both want to watch Black Jack 21?
Queue Up reads two public AniList lists and shows every anime you both have on Planning — with Black Jack 21 flagged if it is one of them — then picks tonight's with a weighted roll or a bracket.
Or open it on AniList or MyAnimeList.
More like this: action · adventure · manga adaptation · crime · cyberpunk · detective · drama · friendship · mystery · revenge · shounen · thriller · tragedy · workplace.
Quick answers
- How long does it take to watch all of Black Jack 21?
- About 6.8 hours for all 17 episodes at 24 min each — a weekend; at two episodes a night that is 9 evenings.
- How many episodes does Black Jack 21 have?
- 17 episodes of 24 min.
- Is Black Jack 21 finished?
- Yes, Black Jack 21 is finished (17 episodes), so you can watch the whole thing at your own pace.
- Is Black Jack 21 good for a group?
- Yes. Black Jack 21 is tagged action, the tags that survive a room full of people talking over the screen.
- Where is Black Jack 21 listed?
- Black Jack 21 is on AniList (id 2214) and MyAnimeList (id 2214); Queue Up keys it by its AniList id and shows it when it is on either of your lists.
Queue Up is a free tool: enter two AniList usernames and it ranks the anime you both want to watch, rolls one for tonight, runs a bracket to settle it and finds new anime that fit both of you. List data from AniList; title data: anime-offline-database (ODbL), dataset of 2026-07-04; page updated 2026-07-04. Not affiliated with AniList or MyAnimeList. Queue Up is a Somebody Decide program. How it works · Legal & privacy · All lists