Mariko Jinnouchi appears in Summer Wars (サマーウォーズ, 2009). Credited cast member with a clear story role. This guide covers who they are, voice credits, and how they fit the film — spoiler-light on top.
Quick information
- Role: Supporting
- Series: Summer Wars (MOVIE, 2009)
- Studio: MADHOUSE · Director Mike McFarland
- JP voice: —
- Also see: All characters · Fact and Spoilers
Who is Mariko?
Mariko Jinnouchi is part of the credited ensemble. Viewers meet them through the main plot of Summer Wars — click sibling character pages when a name sticks on a rewatch.
Voice work: —. The film’s tone depends on ensemble reactions as much as lead speeches, so supporting pages stay in the hub cluster on purpose.
If you arrived from the hub Characters tab, you’re in the right place. Heavy plot spoilers that go beyond this character’s lane live on Fact and Spoilers.
Personality
Mariko supports the film’s emotional register — fear, wonder, duty, comedy, or quiet care — through specific scenes rather than long monologues. That’s normal for theatrical anime ensembles: a few sharp beats beat a fake biography.
On rewatch, watch how other characters treat Mariko. Those reactions often tell you more than any exposition dump.
Powers & skills
Not every cast member is a power-fantasy unit. Narrative position, work role, or social leverage counts as “kit” here.
We don’t invent skill trees the film never shows. If Mariko only has a handful of scenes, this page stays honest about that.
Role in the story
Supports the leads and world. In hub terms, Mariko Jinnouchi is why Characters lists more than two faces — Summer Wars is an ensemble world even when the poster sells one hero.
Relationships
- Natsuki Shinohara: Supporting
- Sakae Jinnouchi: Supporting
- Kenji Koiso: Supporting
- Wabisuke Jinnouchi: Supporting
- Kazuma Ikezawa: Supporting
- Yumi Jinnouchi: Supporting
- Kunihiko Jinnouchi: Supporting
- Kana Jinnouchi: Supporting
- Yuhei Jinnouchi: Supporting
- Yorihiko Jinnouchi: Supporting
- Mansuke Jinnouchi: Supporting
- Rika Jinnouchi: Supporting
- Love Machine: Supporting
Best moments
Pick the scenes where Mariko changes the room — a look, a refusal, a kindness, a threat. Drop your favorite beat in the comments so the page stays reader-driven.
FAQ
Do I need other films first?
Usually no for Mariko. Franchise crossovers/cameos are optional.
Is Mariko a main character?
Supporting / ensemble.
Where next?
Hub · Characters · Facts
Keep exploring
Your turn
Favorite Mariko moment? Who should we deepen next in this cast?
Sources: https://anilist.co/anime/5681