Sato Keisuke
Keisuke 2015
Japanese 佐藤 啓祐
Romaji Sato Keisuke
Personal Information
Status Shamrock Park facility director
Age 31 (3 years prior)
Birthday June 7th
Likes Zoo
Dislikes Udon curry
Appeared in

Sato Keisuke is a character in Logicalism categorized under the Kisetsu no page.


Keisuke is a man who has pale brown eyes, dark neat hair and rather long bangs. He wears a light suit over a brown vest underneath with golden buttons. When he was younger (six years old), he wears the same colored shirt.


Sato Keisuke is the Shamrock Park facility director. Keisuke was an orphan, and as a child, many mocked him because he was poor. He's in good terms with Murasaki Kojiro and Shiohara Yuichi, whom he met when he was younger. He treated him as his brothers as a child, and they were still close even after they'd turn into adults.

He's also a very close friend of Kurono Miyako, whom he has deep feelings for. Keisuke died at age 31 (three years prior to the original timeline) in the events of "Umi wa Sono Nazotoki wo Nozomu no ka?".


Role in the "Umi wa Sono Nazotoki wo Nozomu no ka?"Edit

In "Umi wa Sono Nazotoki wo Nozomu no ka?" Keisuke is one of the passengers invited to the Yotsuba cruise ship event. Keisuke is the 'first' victim of the strings of murder in the ship. Miyako, who screamed and alerted the other passengers, claimed Keisuke fell from the ship and down to the ocean.

In the end of the story it's revealed that he was the one who murdered Kojiro, and Takamatsu Mikaze (and later, Yuichi), saying he did it out of love and didn't want Miyako to dirty her hands. After saying his true feelings to Miyako, he committed suicide. It was later revealed in the epilogue, that he wasn't the one who killed Mikaze; Keisuke saw th dead body of Mikaze, and the culprit could only be Miyako. Although it was for the sake of "revenge", Keisuke had mixed feelings about that death.

Later in Sakasama no Kami-sama, he's blamed to be the culprit of all the murders in the ship.

Role in "Nazokake (novel adaptation)"Edit

Keisuke plays the same role in Nazokake. He came to the ship with Miyako and Kurono Rin, and Rin seemed to know him well, saying that Keisuke was a close friend of her sister's.

Role in the ComicsEdit

Information Panel
Romaji Choumiryou Sannin-kumi
Featuring Shiohara Yuichi, Murasaki Kojiro, Sato Keisuke
Publish date October 2011
Continuity N/A
Comic keisuke

When Yuichi and Kojiro were seventeen years old, Yuichi brought up the topic of adoption. Kojiro asked where that topic came from and he replied saying he wanted to adopt Keisuke who was still six at the time. He was bullied because he was poor, but Kojiro mentioned by the time they were adults, Keisuke would be able to earn money on his own.

Keisuke came into the picture and halted the conversation, and as the topic changed, he said to the two that he wanted to go to the zoo again because a fluffy polar bear he saw on TV the other day reminded him of Yuichi.