The Door into Summer (Japanese Movie)

User Rating

Current user rating: 92/100 (1010 votes)

You need to enable JavaScript to vote

Profile

Movie: The Door into Summer
Romaji: Natsu e no Tobira: Kimi no Iru Mirai e
Japanese: 夏への扉キミのいる未来へ
Director: Takahiro Miki
Writer: Robert A. Heinlein (novel), Tomoe Kanno
Producer: Shinzo Matsuhashi, Yuya Satoyoshi
Cinematographer: Mitsuru Komiyama
Release Date: June 25, 2021
Runtime: 118 min.
Distributor: Toho, Aniplex
Language: Japanese
Country: Japan

Plot Synopsis by AsianWiki Staff ©

In 1995, Soichiro Takakura (Kento Yamazaki) is a scientist and works on developing a robot. He is also on the verge of completing a plasma storage battery, following the wishes of the deceased Koichi Matsushita. He was a friend of Soichiro Takakura's late father.

Outside of work, Soichiro Takakura has peaceful days with his cat Pito and Riko (Kaya Kiyohara), who is the daughter of Koichi Matsushita. He is soon betrayed by his business partner and also by his fiance Rin Shiraishi (Natsuna Watanabe). Soichiro Takakura loses control of his company and the work he has done on the robot and plasma storage battery.

Soichiro Takakura then opts to place himself into a "cold sleep" freezing machine, hoping to find a better future. When he wakes up, he discovers that he is in the year 2025.

Notes

Based on novel "The Door into Summer" by Robert A. Heinlein (published 1957 by Doubleday).

Cast



Kento Yamazaki	Kaya Kiyohara	Naohito Fujiki
Soichiro Takakura	Riko Matsushita	PETE

Additional Cast Members:

Natsuna Watanabe - Rin Shiraishi
Hidekazu Mashima - Kazuhito Matsushita
Taizo Harada - Taro Sato
Rin Takanashi - Midori Sato
Kenta Hamano - Gota Tsuboi
Tomorowo Taguchi - Professor Toi
Ryoka Minamide - Soichiro Takakura (young)
Shinya Hamada

Trailers

Comments

Lee Seohwa Mar 28 2026 5:04 am Looks like Alice Back To The Future

elliemae207 Aug 18 2025 1:01 am This movie could've been titled "Back to the Future 4.0"!! It's a feel-good sci-fi.. and an easy watch if you're taking a break from crime/thriller genre! I give it a 4 out of 5 stars!

I'm here after watching "Rikuoh" and I really liked Kento Yamakazi there.. I see that Kento also has "Kingdom" movie franchise on Netflix, so I will watch those next!

John L Olsavicky Dec 13 2023 9:38 pm I've been a fan of Robert A. Heinlein for over 50 years and this story was one of my favorites. I was so pleased to see the film kept the flavor of the original plot and did the author justice by bringing this tale to motion pictures. If you enjoyed this story, research other books by this author. You will find yourself reading late into the night and loving every minute. Try the one that got me hooked called "Stranger in a Strange Land". Then come back here and tell us how what you thought of it.

Ish Feb 26 2023 3:47 pm Nice movie with a happy ending, but there is one too many Soichiro in 2025, the first version that remains in the loop ... Time travel exists only in one direction, the future and one day after another :-)

Vosco Jun 28 2022 5:13 am Themovie is awesome. And also i want to know the name of the song in the ending part.

AiwaLu Feb 13 2022 7:33 am Watched this because of Kento. I enjoyed it a lot. He never failed me in choosing projects

Sct Flows Jan 25 2022 11:19 am This movie somewhat changed my life to be super productive. Thank you as always Yamazaki Kento. Will be your fan forever.

Jay Quintana Jan 14 2022 4:13 am The only review of this movie I could find was from The Japan Times. And the review was meh, so I wasn't expecting much when I saw this. I really enjoyed this. Not sure all the time travel stuff made sense, but I totally bought into this world. Very enjoyable. I'll probably watch it again soon.

Naria Jan 11 2022 4:10 am The movie is awesome lol but I can't help but ship the main character with the robot. They have chemistry haha

Myan Jan 06 2022 2:56 pm It is on Netflix, yay! currently watching

Wendy Dec 31 2021 3:07 am This movie was actually pretty good! The story is cool and solid. 8/10 def recommend this. I like the part where it started uncovering all the past :)

Starstruck Dec 16 2021 12:07 pm Its releasing on Netflix yayyy

Levo Nov 10 2021 8:02 am I hope this ends up on Netflix, Fujiki is a robot? Sign me up

KenS Mar 15 2021 12:14 am I wish I understood Japanese. I hope it is released with subtitles.

Tuesday Jan 26 2021 6:45 am Kento that i always look after for the movies or drama :')

M Jan 03 2021 3:06 pm I'm not sure if I'm going to watch this but I want to watch this just to stare at the cat! So cuuuuuuute...

The Great And Powerful Turtle Dec 22 2020 6:44 am Looking at the trailer they seem to have changed some of the story(cant really tell how much without subs) but i wont pass judgement on it yet ...it hard anyway because you have to change the story to make it fit into a Japanese narrative plus it would need updating in a lot of areas(the book was written in 1957)

mina myoui best girl Nov 06 2020 1:01 am kento never disappoints!!!

Anjali Negi Oct 05 2020 8:47 pm Fujiki is a robot? Cool

Esaa Aug 26 2020 11:58 am I hope the female character is "Riko" .. tao tsuchiya, yuko araki or alice hirose .

Malcolm Jul 06 2020 4:53 am Well there`s a thing...The Door into Summer is one hell of a twisty book,robots cryogenics and time travel..plus betrayal and kidnapping The drama will be a blast if it follows the book(the synopsis here is definitely that of the book) it certainly something i`m going to be looking out for...

Dana Quinney Jun 29 2020 1:22 pm I cannot wait. The Door into Summer is one of my all-time favorite novels. Please let me know when it's out! YAY!

Flexible Frank Jun 29 2020 6:51 am Loved the book. Hopefully they can do a good adaptation. Wonder who'll play the kid.

@Ika No.

Ika Jun 29 2020 6:07 am Korean Melting me softly but japan version..?

hi_ Jun 29 2020 4:13 am Yamaken is so busy! Fighting!

The Door into Summer (Japanese Movie)

Contents

User Rating

Profile

Plot Synopsis by AsianWiki Staff ©

Notes

Cast

Trailers

Comments

Leave a Comment

Comments