Megami Tensei Wiki

"Hear him well, messenger. The world belongs to a host of the divine, not some misguided dictator."
—Hayao Koshimizu, Shin Megami Tensei V

Hayao Koshimizu is a character in Shin Megami Tensei V.



He bears a near-perfect resemblance to Aogami.

Shin Megami Tensei V[]

Koshimizu wears an Imperial Seal of Japan pin on the left of his suit jacket, much like real Japanese Prime Ministers. The pin's 16-petalled chrysanthemum on a red background is a symbol of the Prime Minister's role in the Japanese Diet, though Koshimizu's pin only has 6 petals.

Koshimizu also lacks the blue ribbon pin of modern day Prime Ministers Shinzo Abe and Yoshihide Suga, a reminder to "bring back the Japanese people who were abducted by North Korea in the 1970s and 80s"[1].


Shin Megami Tensei V[]

Koshimizu is the Prime Minister of Japan and the head of Bethel's Japan branch. He is calm, collected and strategic. Staff commend him for his talents and ability to handle such heavy workflow, while the public questions why there's no background on him. That is because he's actually Tsukuyomi, but keeps his identity as an Amatsukami secret. This also applies to his brother Aogami, who's actually Susano-o.

He offers the protagonist and Ichiro Dazai to join Bethel once they're retrieved back from Da'at, giving the latter a Demon Summoning Program, helping him fight demons.

Once Bethel defeats the forces of chaos in Chiyoda with the protagonist's help, with the world of Tokyo fading, he discloses the truth to the three students of Jouin, he announces that he will no longer cooperate with the other branches of the group, instead deciding to take the throne for himself in order to give Tokyo back to the Japanese Gods. However, before he officially does this, he joins the Bethel Summit with Abdiel alongside the boys, Khonsu, Zeus, Vasuki and Odin. Upon observing Abdiel's defeat in the hands of the Nahobino protagonist alongside the other gods, who tried to slay him upon trying to enforce God's laws which his existence violated, he denounces the Creator as a "despotic tyrant" before leaving in disappointment like the other summit participants.

Once back to Bethel Japan HQ, he explains to the boys about the war of the Gods, the Empyrean, the Throne and Nahobino before he recruits Yuzuru Atsuta into his cause and plans to use him as a Nahobino vessel so he could take the throne.

If the protagonist sides with his ideology, he and Yuzuru will be killed by Abdiel, with them being the first boss of their path, and will later confront Nuwa. If they don't side with them, they will take the spot of the side they support as a boss.


  • Hayao's surname Koshimizu means "overwater" (越水).
    • It can also mean "surpass, cross over, move to, exceed, Vietnam" (越) (koshi) and "water" (水) (mizu) separately.

In Other Languages[]

Language Title
Flag of the United States English Hayao Koshimizu
Flag of Japan Japanese 越水 ハヤオ
Flag of South Korea Korean 코시미즈 하야오
Flag of Hong KongFlag of the Republic of China.svg Traditional Chinese 越水 駿


Playable Protagonist
Other Aogami - Sophia - Gustave - Goko
Amanozako - Fionn mac Cumhaill - Lahmu - Lucifer
Tao Isonokami - Yuzuru Atsuta - Ichiro Dazai - Miyazu Atsuta - Hayao Koshimizu - Sahori Itsukishima
Abdiel - Khonsu - Vasuki - Zeus - Odin - Shiva
Shohei Yakumo - Nuwa
Demi-fiend - Artemis - Cleopatra - Mephisto
Tokyo Jouin High School - Shinagawa Station - Takanawa Tunnel - Jozoji
Da'at Minato - Shinagawa - Chiyoda - Taito - Demon King's Castle - Temple of Eternity - Empyrean - Tree of Knowledge
Albums Original Soundtrack
Songs N/A
Terminology Nahobino - Bethel - Knowledge - Magatsuhi - Shekinah Glory - Demon Summoning Program - Conception
Mechanics Demon - Press Turn - Moon Phase System - Alignment‎ - Negotiation (Dialogue) - Encounters - Fusion - Race and species - Difficulty
Skill Potential - Magatsuhi Skills - Essence - Glory - Miracles - Menorah
World of Shadows - Cadaver's Hollow - Miman - Treasure Boxes - Vending Machines - Demon Statues - Abscess - Magatsuhi Crystals - Leyline Fount - Terminal - Gifts
Lists Bosses - Skills - Items - Status Changes - Quests - Demons
Other Script - Updates
Other Media
Promotion Daily Demon - News
TGS 2021
Other Demon Colosseum - Merchandise