According to his former colleague Akira Sakuma, Jun SATOH passed away on April 19, 2021. Sakuma added that SATOH worked as a graphic designer for Data East before working as a freelance illustrator (Sources 1, 2)
Games
Other video game related works
To be confirmed
Gallery
Act-Fancer: Cybernetick Hyper Weapon / アクトフェンサー (Arcade - 1989)
Graphic design (Source: in-game credits)
After Armageddon Gaiden: Majuu Toushouden Eclipse / アフターハルマゲドン外伝 魔獣闘将伝エクリプス (Mega-CD - 1994)
Cover art (Source: signature found on the artwork )
Alien Soldier / エイリアンソルジャー (Mega Drive - 1995)
Cover art (Source: signature found on the artwork + mentioned by Treasure historian John Harrison on Twitter)
Atomic Robo-Kid Special / アトミックロボキッドスペシャル (PC Engine - 1990)
Cover art (Source: mentioned by Akira Sakuma on Twitter)
Ax Battler: Golden Axe Densetsu / アックスバトラー ゴールデンアックス伝説, AKA Ax Battler: A Legend of Golden Axe (Game Gear - 1991)
Cover art of the Japanese version (Source: Sega TV Game Genga Gallery)
Chelnov / チェルノブ, AKA Atomic Runner (Arcade - 1988)
Graphic design (Source: in-game credits)
Death Brade / デスブレイド, AKA Mutant Fighters (Arcade - 1991)
Flyer illustration (Source: signature found on the artwork)
Fighter's History / ファイターズヒストリー (SFC - 1994)
Cover art (Source: signature found on the artwork)
.Note: There are in fact at least 3 versions of this artwork: one for the Japanese version, one for the American version and one for its sequel, released on NeoGeo around the same time.
Fighter's History Dynamite / ファイターズヒストリーダイナマイト, AKA Karnov's Revenge (NeoGeo - 1994, Saturn - 1997)
Cover art / Flyer illustration (Source: signature found on the cover of Fighter's History)
Golden Axe II / ゴールデンアックスII (Mega Drive - 1991)
Cover art of the Japanese version (Source: Sega TV Game Genga Gallery)
Golden Axe III / ゴールデンアックスIII (Mega Drive - 1993)
Manual illustrations of the Japanese version (Source: Sega TV Game Genga Gallery)
Heavy Barrel / ヘビー・バレル (Arcade - 1987)
Flyer illustration (Source: confirmed by Yuichi Takagi, via their former colleague Akira Sakuma)
Graphic design (Source: in-game credits)
Jewel Master / ジュエル・マスター (Mega Drive - 1991)
Manual illustrations of the Japanese version: Story & Monster illustrations (Source: Sega TV Game Genga Gallery)
Ninja Gaiden / 忍者外伝 (Game Gear - 1991)
Cover art of the Japanese version (Source: Sega TV Game Genga Gallery)
Shadow Dancer / シャドー・ダンサー (Mega Drive - 1990)
Cover art of the Japanese version (Source: Sega TV Game Genga Gallery)
Ys / イース (X68000 - 1991)
"illustrations" (with Hiroshi Arai / 荒井啓至) (Source: in-game credits, via: Psyzans)
Act-Fancer: Cybernetick Hyper Weapon / アクトフェンサー (Arcade - 1989)
Flyer illustration (Source: )
Breywood / ブレイウッド, AKA Shackled (Arcade - 1986)
Flyer illustration for the Japanese version (Source: )
Buster Fight / バスターファイト (Game Gear - 1994)
Cover art (Source: )
China Town / チャイナタウン (Arcade - 1991)
Flyer illustration (Source: )
Dragon Ninja / ドラゴンニンジャ, AKA Bad Dudes Vs. DragonNinja (Arcade - 1988)
Flyer illustration for the Japanese version (Source: )
Fighter's History: Mizoguchi Kiki Ippatsu!! / ファイターズヒストリー 〜溝口危機一髪!! (SFC - 1995)
Cover art (Source: )
Fighting Fantasy / ファイティングファンタジー, AKA Hippodrome (Arcade - 1989)
Flyer illustration for the Japanese version (Source: )
Kuhga: Operation Code "Vapor Trail" / 空牙, AKA Vapor Trail (Arcade - 1989)
Flyer illustration for the Japanese version (Source: )
Liberation / リバレーション (Arcade - 1984)
Flyer illustration (Source: )
Meikyū Hunter G / 迷宮ハンターG, AKA The Real Ghostbusters (Arcade - 1987)
Flyer illustration for the Japanese version (Source: )
Secret Agent / シークレット・エージェント, AKA Sly Spy (Arcade - 1989)
Flyer illustration for the Japanese version (Source: )
Shin Eiyūden / 史記英雄伝 (SFC - 1995)
Cover art (Source: )
Logout (Magazine)
Illustrations for Shin Wizardry RPG / 真ウィザードリィRPG (March 1993 - december 1993) (Source: this website which details the content of each issue of Logout)
After Armageddon Gaiden: Majuu Toushouden Eclipse
Alien Soldier
Atomic Robo-Kid Special
Ax Battler: Golden Axe Densetsu
Death Brade
Fighter's History / Fighter's History Dynamite
Golden Axe II
Golden Axe III
Heavy Barrel
Jewel Master
Ninja Gaiden
Shadow Dancer