We Are Aliens Unveils Main Trailer and Poster as Ten Yamasaki Joins the Cast

What was announced

The original anime film We Are Aliens has released its main trailer and main poster and revealed new additions to its voice cast. Animage Plus reported the reveal, and Hokkoku Shimbun carried the same announcement, both confirming that the film opens in Japanese theaters on September 25, 2026.

Ten Yamasaki of Sakurazaka46 joins as Konatsu Meguro, a classmate who has lived near the protagonist Tsubasa since childhood. The role is Yamasaki's first as a voice actor. Speaking to Hokkoku Shimbun about the experience, she said she was nervous at first, but that the time she spent with the work was stimulating and taught her a great deal.

Kemuri Matsui of the comedy duo Reiwa Roman plays Dai Batahara, a friend of Tsubasa's who, according to Animage Plus, is quietly a fan of Akitaro. Two child roles were filled at the same time. Saki Suzuki voices the young Konatsu, and Yo Suenaga voices the young Batahara.

Who is already attached

The new names join a lead pair announced earlier. Ryota Bando voices Tsubasa, described as a shy and ordinary young man, and Amane Okayama voices Akitaro, the classmate everyone looks up to.

The film is an original feature rather than an adaptation, with no source manga or novel behind it. Kohei Kadowaki, whose credits include the music video for YOASOBI's "Yasashii Suisei," is credited with the planning, screenplay and direction. Yaffle handles the music, and also wrote and composed the theme song "Sasakure," performed by adieu, the music project of Moka Kamishiraishi. Animage Plus lists NOTHING NEW as the production label, with MIYU PRODUCTIONS co-producing.

Background

Our catalog describes the story as beginning one summer in the third grade, when a quiet boy named Tsubasa becomes close friends with a boy the rest of the class looks up to. Within their small world the two share irreplaceable moments, until a small incident suddenly tears them apart.

Animage Plus frames the finished film as following that friendship across more than 30 years, from childhood into adulthood, and describes a trailer that sets bright memories of youth against the distance between the two as adults. The outlet notes the trailer leaves the question of whether this is a coming of age story or a memory someone would rather erase deliberately open.