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Midsummer's Equation

2013·Movie·129 min·7.0(40)

Masaharu Fukuyama reprises his role from 2008's "Suspect X," playing the physicist-cum-detective Manabu Yukawa. The scientist-sleuth arrives in an oceanside town to speak on a panel. But when a man turns up dead outside the inn where he's staying, Yukawa begins to unravel the connections that tie the victim to the activist daughter of the innkeepers, and a precocious boy who first appears on a train—and keeps popping up. It's a Sherlock Holmes mystery with an environmental twist, and one that should please fans of a classic whodunnit.

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Where to watch Midsummer's Equation in United States

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Click a service to open Midsummer's Equation there. Availability last verified on June 21, 2026.

About Midsummer's Equation

Midsummer's Equation is a 2013 Japanese-language crime, drama and mystery film directed by Hiroshi Nishitani. The cast is led by Masaharu Fukuyama, Yuriko Yoshitaka, Kazuki Kitamura. It has a runtime of 2h 9m.

Midsummer's Equation was produced by TOHO, FILM, and AMUSE and made in Japan. It was released on June 28, 2013.

Director
Hiroshi Nishitani
Writers
Yasushi Fukuda
Release date
June 28, 2013
Original language
Japanese
Status
Released
Country
Japan
Production
TOHO, FILM, AMUSE
#based on novel or book#genius#murder#physicist#summer#enviromental#mysterious death#onsen#ecentric genius#ryokan

Midsummer's Equation cast & crew

Midsummer's Equation was directed by Hiroshi Nishitani and written by Yasushi Fukuda.

The cast features Masaharu Fukuyama as Manabu Yukawa, Yuriko Yoshitaka as Misa Kishitani, Kazuki Kitamura as Shumpei Kusanagi, Anne Watanabe as Narumi Kawabata, Jun Fubuki as Setsuko Kawabata, and Hakuryu as Hidetoshi Senba.

Behind the camera, the score was composed by Masaharu Fukuyama, cinematography is by Katsumi Yanagijima, and it was produced by Yoshihiro Suzuki and Chihiro Kameyama.

Is Midsummer's Equation worth watching?

At 2h 9m, it's a standard feature-length watch.

If you enjoy crime, drama, and mystery, Midsummer's Equation is worth a place on your watchlist.

How and where to watch Midsummer's Equation

Midsummer's Equation isn't currently available on major streaming services in United States. We track availability continuously — add it to your watchlist and we'll keep an eye out.

Streaming rights change country by country and month by month, so the options above reflect United States today — switch your country at the top of the where-to-watch section to see availability elsewhere.

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Cast of Midsummer's Equation

Masaharu Fukuyama

Masaharu Fukuyama

Manabu Yukawa

Yuriko Yoshitaka

Yuriko Yoshitaka

Misa Kishitani

Kazuki Kitamura

Kazuki Kitamura

Shumpei Kusanagi

Anne Watanabe

Anne Watanabe

Narumi Kawabata

Jun Fubuki

Jun Fubuki

Setsuko Kawabata

Hakuryu

Hakuryu

Hidetoshi Senba

Gin Maeda

Gin Maeda

Shigeharu Kawabata

Naomi Nishida

Naomi Nishida

Nobuko Miyake

Sansei Shiomi

Sansei Shiomi

Shoji Tsukahara

Tetsushi Tanaka

Tetsushi Tanaka

Keiichi Tsukazaki

Hikaru Yamazaki

Hikaru Yamazaki

Kyohei Tsukazaki

Tôru Kizu

Tôru Kizu

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Midsummer's Equation — FAQs

Where can I watch Midsummer's Equation in United States?

Midsummer's Equation is not currently available on major streaming services in United States. Availability changes often — check back soon.

What language is Midsummer's Equation in?

Midsummer's Equation is originally in Japanese. Subtitle and dub options vary by streaming service.

How long is Midsummer's Equation?

Midsummer's Equation runs 2 hours 9 minutes (129 minutes).

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Midsummer's Equation (2013) — where to watch online · SearchOTT