Resources

Official

• Ancient Corp Yuzo and Ayano Koshiro's studio - official website (Japanese)
• GDC 2011 Talk - Koshiro "Memories of a Composer: Creating the Streets of Rage Soundtrack" - primary source; GDC Vault recording

Databases

• VGMdb Video game music database - comprehensive Koshiro discography, album credits, and OST catalogue
• VGMPF - Video Game Music Preservation Foundation Platform-specific soundtrack documentation; useful for FM synthesis / SPC700 technical notes
• MobyGames Game credits database - per-title credit verification for Koshiro, Ayano, and Kawashima

Streets of Rage Fan Archives

• Sonic Retro Sega / Mega Drive community; Streets of Rage discussion and technical documentation
• Streets of Rage Online Fan community; gameplay, music, and history resources for the SoR trilogy
• Digital Foundry on YouTube DF Retro episodes covering Mega Drive hardware and Streets of Rage technical analysis

Interviews & Features

• MDCAST Mega Drive podcast; conducted a primary interview with Koshiro covering the SoR era
• Inverse 2020 interview with Koshiro around Streets of Rage 4 launch
• Waypoint / Vice Games 2020 feature-length Koshiro career retrospective

Video

• World of Longplays Full-length longplay recordings of all flagship titles - SoR1, SoR2, SoR3, ActRaiser, Revenge of Shinobi, Beyond Oasis
• YouTube - Yuzo Koshiro Channel Official OST uploads and archival content; search "Yuzo Koshiro" for curated playlists