(If somebody knows of a release I haven't listed here, please tell me so I can add it onto the list – leave a comment or message. It would be a great help. Also feel free to point out if I've made any mistakes so I can correct them. Thanks!)
RELEASED BY MIYA RECORDS
BOOTLEG ORIGINAL SOUNDTRACKS (OST)
MICA-0117 Howl’s Moving Castle / Hauru no Ugoku Shiro - Image Symphony
MICA-0149 Princess Mononoke / Mononoke Hime - Soundtrack
MICA-0321 Princess Mononoke / Mononoke Hime - Symphonic Suite
MICA-0376 Howl’s Moving Castle / Hauru no Ugoku Shiro - Soundtrack
MICA-0486 My Neighbor Totoro / Tonari no Totoro - Soundtrack
MICA-0487 Kiki’s Delivery Service / Majo no Takkyuubin - Soundtrack
MICA-0488 Porco Rosso / Kurenai no Buta - Soundtrack
MICA-0489 Laputa: Castle in the Sky / Tenkuu no Shiro Rapyuta - Soundtrack
MICA-0490 Nausicaä of the Valley of the Wind / Kaze no Tani no Naushika - Soundtrack
MICA-0704 Tales from Earthsea / Gedo Senki - Soundtrack
MICA-0705 Tales from Earthsea / Gedo Senki - Songbook
MICA-0750 Tales from Earthsea / Gedo Senki - Piano Plus
MICA-0769 Melodies from Tales from Earthsea / Gedo Senki
MICA-0938 Ponyo on the Cliff by the Sea / Gake no Ue no Ponyo - Image Album
MICA-0975 Ponyo on the Cliff by the Sea / Gake no Ue no Ponyo - Soundtrack
MICK-7001 The Wind Rises / Kaze Tachinu - Soundtrack
BOOTLEG COLLABORATION ALBUMS
MICA-0266 Studio Ghibli Songs
MICA-0437 Ukulele Ghibli
MICA-0438 Songs from the Studio Ghibli Movies - Yosei Tachi no Orgel
MICA-0439 Studio Ghibli Sakuhin Shu - New Piano Interior
MICA-0514 GHIBLI the Classics / Kaoru Kukita
MICA-0616 Czech Philharmonic Orchestra Plays Studio Ghibli Symphonic Collection
MICA-0670 String Music on Studio Ghibli - Kimi wo Nosete
MICA-0974 Ghibli the Best
MICA-0976 The Best Music Box Collection From Hayao Miyazaki Films
MICA-0977 Hayao Miyazaki On Bossa
MICA-0978 Studio Ghibli Works - Slack-Key Guitar de Kiku Studio Ghibli no Sekai
MICA-0979 Niko & Chugoku Dento Gakki de Kiku - Studio Ghibli no Sekai
MICA-0993 Ragga GHIBLI / THITIKA
MICA-0994 the Ghibli set / DAISHI DANCE
MICA-0995 Brasta Ghibli / Tokyo Brass Style
MICA-0996 Piano De Ghibli Studio Ghibli Works Piano Collection
MICA-1016 Orgel + Ghibli wo Kiku
MICA-1018 Ghibli My Sweet
MICA-1089 Ghibli in Classic - Ponyo on the Cliff by the Sea/My Neighbor Totoro
MICA-1019~20 Studio Ghibli Songs [2 CD]
MICA-1090~1 Ghibli in Music Box - Ponyo on the Cliff by the Sea/My Neighbor Totoro [2 CDs]
MICA-1193 Ghibli Sapuri Alive 2
BOOTLEG ORIGINAL SOUNDTRACKS (OST)
KO-88001 Princess Mononoke / Mononoke Hime - Soundtrack
KO-88002 Princess Mononoke / Mononoke Hime - Symphony
KO-88003 Spirited Away / Sen to Chihiro no Kamikakushi - Image Album
KO-88004 Spirited Away / Sen to Chihiro no Kamikakushi - Soundtrack
KO-88005 Howl’s Moving Castle / Hauru no Ugoku Shiro - Image Symphony
KO-88006 The Cat Returns / Neko no Ongaeshi - Soundtrack
KO-88008 Kiki’s Delivery Service / Majo no Takkyuubin - Soundtrack
KO-88009 Howl’s Moving Castle / Hauru no Ugoku Shiro - Soundtrack
KO-88011 Laputa: Castle in the Sky / Tenkuu no Shiro Rapyuta - Soundtrack
KO-88012 My Neighbor Totoro / Tonari no Totoro - Soundtrack
KO-88013 Nausicaä of the Valley of the Wind / Kaze no Tani no Naushika - Best Collection
KO-88014 My Neighbor Totoro / Tonari no Totoro - Image Song Collection
KO-88017 Tales from Earthsea / Gedo Senki - Soundtrack
KO-88018 Tales from Earthsea / Gedo Senki - Song Collection
KO-88019 Tales from Earthsea / Gedo Senki - Piano Collection
KO-88020 Melodies from Tales from Earthsea / Gedo Senki
BOOTLEG COLLABORATION ALBUMS
KO-88007 Studio Ghibli Songs
KO-88010 Howl’s Moving Castle / Hauru no Ugoku Shiro - Alpha Wave Orgel Collection
KO-88015 Czech Philharmonic Orchestra Plays Studio Ghibli Symphonic Collection
KO-88016 String Music on Studio Ghibli - Kimi wo NoseteBOOTLEG ORIGINAL SOUNDTRACKS (OST)
AnG-032 My Neighbor Totoro / Tonari no Totoro - Song & Karaoke
AnG-035 Whisper of the Heart / Mimi wo Sumaseba - Soundtrack
AnG-036 Nausicaä of the Valley of the Wind / Kaze no Tani no Naushika - Soundtrack
AnG-037 Grave of the Fireflies / Hotaru no Haka - Image Album
AnG-038 Porco Rosso / Kurenai no Buta - Image Album
AnG-039 Only Yesterday / Omohide Poroporo - Image Album
AnG-040 Grave of the Fireflies / Hotaru no Haka - Soundtrack
AnG-041 My Neighbor Totoro / Tonari no Totoro - Soundtrack
AnG-043 Laputa: Castle in the Sky / Tenkuu no Shiro Rapyuta - Soundtrack
AnG-044 Laputa: Castle in the Sky / Tenkuu no Shiro Rapyuta - Symphony
AnG-069 Spirited Away / Sen to Chihiro no Kamikakushi - Image Album
AnG-142 Kiki’s Delivery Service / Majo no Takkyuubin - Soundtrack
AnG-156 My Neighbor Totoro / Tonari no Totoro - Sound Book
AnG-156 My Neighbor Totoro / Tonari no Totoro - Sound Book
AnG-157 My Neighbor Totoro / Tonari no Totoro - Image Song Collection
AnG-158 Kiki’s Delivery Service / Majo no Takkyuubin - Hi-Tech Series
AnG-159 Whisper of the Heart / Mimi wo Sumaseba - Image Album
AnG-201 Princess Mononoke / Mononoke Hime - Image Album
AnG-202 My Neighbor Totoro / Tonari no Totoro - Hi-Tech Series
AnG-203 Kiki’s Delivery Service / Majo no Takkyuubin - Vocal Album
AnG-204 Kiki’s Delivery Service / Majo no Takkyuubin - Image Album
AnG-205 Laputa: Castle in the Sky / Tenkuu no Shiro Rapyuta - Image Album
AnG-206 Laputa: Castle in the Sky / Tenkuu no Shiro Rapyuta - High-Tech Series
AnG-213 Nausicaä of the Valley of the Wind / Kaze no Tani no Naushika - High Tech Series
AnG-214 Nausicaä of the Valley of the Wind / Kaze no Tani no Naushika - Image Album
AnG-215 Nausicaä of the Valley of the Wind / Kaze no Tani no Naushika - Symphony
AnG-216~217 Nausicaä of the Valley of the Wind / Kaze no Tani no Naushika - Best Collection
AnG-219 Porco Rosso / Kurenai no Buta - Soundtrack
AnG-219 Ocean Waves / Umi ga Kikoeru - Soundtrack
AnG-226 Only Yesterday / Omohide Poroporo - Soundtrack
AnG-227 Only Yesterday / Omohide Poroporo - Classical Ensemble
AnG-228 Pom Poko / Heisei Tanuki Gassen Pon Poko - Soundtrack
AnG-229 Pom Poko / Heisei Tanuki Gassen Pon Poko - Image Album
A8-895 Princess Mononoke / Mononoke Hime - Symphony
A8-1389 Spirited Away / Sen to Chihiro no Kamikakushi - Soundtrack
BOOTLEG COLLABORATION ALBUMS
AnG-002 Studio Ghibli Songs
AnG-033 Miyazaki Anime Music Box I
AnG-034 Miyazaki Anime Music Box II
AnG-033 Miyazaki Anime Music Box I
AnG-034 Miyazaki Anime Music Box II
AnG-081 Animage Best Symphony
AnG-160 Glass no Kuni no Miyazaki Anime no Sekai
AnG-238 Hayao Miyazaki no Sekai / World - Orgel Collection
AnG-239 Hayao Miyazaki no Sekai / World 3 - Orgel Collection
AnG-240 Hayao Miyazaki no Sekai / World 4 - Orgel Collection
AnG-272 Hayao Miyazaki Anime Works Collection - Brass Fantasy
AnG-273 Hayao Miyazaki Anime Works Collection - Brass Fantasy II
AnG-274 Miyazaki the Best - Collection
AnG-345 Hayao Miyazaki no Sekai / World 2 (Kurenai no Buta) - Orgel Collection
AnG-346 Hayao Miyazaki no Sekai / World 5 (Sen to Chihiro no Kamikakushi) - Orgel Collection
RELEASED BY ALION INTERNATIONAL RECORDS
BOOTLEG ORIGINAL SOUNDTRACKS (OST)
ALCA-8060 The Cat Returns / Neko no Ongaeshi - Soundtrack
ALCA-8061 Ghiblies Episode 2 - Soundtrack
ALCA-8079 Castle in the Sky - USA Version Soundtrack
ALCA-8197 Koro’s Big Day Out / Koro no Dai Sanpo - Soundtrack
ALCA-8198 The Whale Hunt / Kujiratori - Soundtrack
BOOTLEG ORIGINAL SOUNDTRACKS (OST)
SM-002 Laputa: Castle in the Sky / Tenkuu no Shiro Rapyuta - Soundtrack
SM-003 Kiki’s Delivery Service / Majo no Takkyuubin - Soundtrack
SM-005 My Neighbor Totoro / Tonari no Totoro - Soundtrack
SM-019 My Neighbor Totoro / Tonari no Totoro - Image Song Collection.
SM-020 Only Yesterday / Omohide Poroporo - Soundtrack
SM-021 Only Yesterday / Omohide Poroporo - Image Album
SM-057 Only Yesterday / Omohide Poroporo - Classical Ensemble
SM-063 Nausicaä of the Valley of the Wind / Kaze no Tani no Naushika - Best Collection
SM-076 Kiki’s Delivery Service / Majo no Takkyuubin - Image Album
SM-077 Nausicaä of the Valley of the Wind / Kaze no Tani no Naushika - High Tech Series
SM-078 Laputa: Castle in the Sky / Tenkuu no Shiro Rapyuta - High Tech Series
SM-090 Grave of the Fireflies / Hotaru no Haka - Soundtrack
SM-091 Grave of the Fireflies / Hotaru no Haka - Image Album
SM-139 My Neighbor Totoro / Tonari no Totoro - High Tech Series
SM-140 Porco Rosso / Kurenai no Buta - Image Album
SM-157 Kiki’s Delivery Service / Majo no Takkyuubin - Vocal Album
SM-216 Porco Rosso / Kurenai no Buta - Soundtrack
SM-227 Laputa: Castle in the Sky / Tenkuu no Shiro Rapyuta - Symphony
SM-228 Laputa: Castle in the Sky / Tenkuu no Shiro Rapyuta - Image Album
SM-253 Pom Poko / Heisei Tanuki Gassen Pon Poko - Image Album
SM-380 Whisper of the Heart / Mimi wo Sumaseba - Soundtrack
SM-388 Whisper of the Heart / Mimi wo Sumaseba - Image Album
SMA-011 Spirited Away / Sen to Chihiro no Kamikakushi - Soundtrack
SMA-116 Princess Mononoke / Mononoke Hime - Image Album
SMB-001 My Neighbor Totoro / Tonari no Totoro - Soundtrack
SMB-002 My Neighbor Totoro / Tonari no Totoro - Image Song Collection
SMB-003 My Neighbor Totoro / Tonari no Totoro - High-Tech Series
SMB-006 Laputa: Castle in the Sky / Tenkuu no Shiro Rapyuta - Symphony
SMB-007 Nausicaä of the Valley of the Wind / Kaze no Tani no Naushika - Best Collection
SMB-008 Nausicaä of the Valley of the Wind / Kaze no Tani no Naushika - High-Tech Series
SMB-007 Nausicaä of the Valley of the Wind / Kaze no Tani no Naushika - Best Collection
SMB-008 Nausicaä of the Valley of the Wind / Kaze no Tani no Naushika - High-Tech Series
SMB-009 Nausicaä of the Valley of the Wind / Kaze no Tani no Naushika - Symphony
SMB-010 Kiki’s Delivery Service / Majo no Takkyuubin - Soundtrack
SMB-011 Kiki’s Delivery Service / Majo no Takkyuubin - Vocal Album
SMB-012 Only Yesterday / Omohide Poroporo - Soundtrack
SMB-013 Grave of the Fireflies / Hotaru no Haka - Soundtrack
SMB-016 Whisper of the Heart / Mimi wo Sumaseba - Soundtrack
SMB-017 Porco Rosso / Kurenai no Buta - Soundtrack
GGG-036 Princess Mononoke / Mononoke Hime - Soundtrack
GGG-095 Princess Mononoke / Mononoke Hime - Symphony
GGG-261 My Neighbor Totoro / Tonari no Totoro - Song & Karaoke
GGG-384 Spirited Away / Sen to Chihiro no Kamikakushi - Image Album
BOOTLEG COLLABORATION ALBUMS
SM-001 Perfect of Animage - Collection
SM-004 Animation The Movie - Collection
SM-025 Animage Best Collection
SM-061 Joe Hisaishi Image Album - Best Collection
SM-094 Animage Singles
SM-202 Animage Complete Collection
SM-217 Animage Memorial Collection
SM-219 Glass no Kuni no Miyazaki Anime no Sekai
SM-226 Animage Vocal Collection
SM-241 Animage Brass Fantasy Vol.1
SM-242 Animage Brass Fantasy Vol.2
SMB-018 Perfect of Animage - Collection
SMB-019 Animage Singles
SMB-020 Animage Vocal Collection
GGG-078 Animage Complete Collection
GGG-079 Animage Vocal & Karaoke Collection
GGG-085 Studio Ghibli Songs
GGG-264 Studio Ghibli Songs+One
RELEASED BY SMILE FACE RECORDS
BOOTLEG ORIGINAL SOUNDTRACKS (OST)
HO-030 The Cat Returns / Neko no Ongaeshi - Soundtrack
HO-059 Castle in the Sky - USA Version Soundtrack
HO-060 My Neighbor Totoro / Tonari no Totoro - Orchestra Stories
HO-119 Howl’s Moving Castle / Hauru no Ugoku Shiro - Image Symphony
HO-119 Howl’s Moving Castle / Hauru no Ugoku Shiro - Image Symphony
BOOTLEG COLLABORATION ALBUMS
HO-025 Anime Music Box - Angel Kiss Orgel - Hayao Miyazaki