[2021.04.21] Mushoku Tensei ~Isekai Ittara Honki Dasu~ - Original Soundtrack 1
[2021.04.21] Mushoku Tensei ~Isekai Ittara Honki Dasu~ - Original Soundtrack 1 Special Edition
[2021.12.22] Mushoku Tensei ~Isekai Ittara Honki Dasu~ - Theme Song Collection
[2022.01.19] Mushoku Tensei ~Isekai Ittara Honki Dasu~ - Original Soundtrack 2
[2022.01.19] Mushoku Tensei ~Isekai Ittara Honki Dasu~ - Original Soundtrack 2 Special Edition

Original Soundtrack 1
01. Magic Lesson
02. A World Where Magic Exists
03. Chant
04. Rudy's Error
05. Small Family Teacher ~Roxy~
06. Jobless Reincarnation
07. A World I've Never Seen Before
08. A Present from Roxy
09. Despair Outside
10. Roxy's Last Lesson
11. Master's Talisman
12. Days of the Greyrat Family
13. Friend
14. Unexpected Reality
15. Eris Smile
16. Sylphy's Tears
17. A Letter from Roxy
18. Only (Acoustic Ver.)
19. Paul VS Rudy
20. Alone with Ghislaine
21. Eris' Anger
22. You Can't Buy A Dere with Money
23. Sauros Enters
24. Onegai-nyan~
25. Ghislaine's Guidance
26. Swordsmanship Lesson
27. A Dance Without Magic
28. A Promise in 5 Years!
29. Hitogami's Advice
30. An Important Companion

Original Soundtrack 1 Special Edition
01. Magic Lesson
02. A World Where Magic Exists
03. Chant
04. Rudy's Error
05. Small Family Teacher Roxy
06. Roxy's Training
07. Jobless Reincarnation
08. 5 Year Old Celebration
09. Rudy's Nice Guy Skill
10. A World I've Never Seen Before
11. A Present from Roxy
12. Despair Outside
13. Roxy's Last Lesson
14. Master's Talisman
15. Days of the Greyrat Family
16. Friend
17. Unexpected Reality
18. Magic to Teach Sylph
19. Sylphy's Tears
20. A Letter from Roxy
21. Only (Acoustic Ver.)
22. Ghislaine Enters
23. Paul VS Rudy
24. Boreas Family
25. Eris' Angry
26. You Can't Buy A Dere with Money
27. Sauros Enters
28. Ghislaine's Guidance
29. Swordsmanship Lesson
30. Boreas' One Day in the Mansion
31. 10 Year Old Feast
32. A Dance Without Magic
33. A Promise in 5 Years!
34. Hitogami's Advice
35. Ruijerd
36. Nokopara's Plot
37. Mezame no Uta (Acoustic Ver.)

Theme Song Collection
01. Tabibito no Uta (OP1)
02. Mezame no Uta (OP2)
03. Keishou no Uta (OP3)
04. Inori no Uta (OP4)
05. Tooku no Komori no Uta (OP5)
06. Tabibito no Uta ~Kikyou~ (OP6)
07. Only (ED1)
08. Kaze to Iku Michi (ED2)

Original Soundtrack 2
01. Adventure
02. Thinking
03. Tactics
04. Mischief
05. Bad situation
06. A place where magical power gathers
07. Ruijerd's Wrath
08. On the palm
09. Farewell of Minitona and Eris
10. Millis Holy Land
11. First Sea
12. Demon Empress Kishirika Kishirisu!~
13. Ghislaine's Matter
14. To Gain Trust
15. Wenport
16. Smuggling Ring
17. Strategy Meeting
18. Power of Smiles
19. Comfortable Prison
20. Newcomers with Seniors
21. The Doldia Tribe
22. Joint Struggle
23. Reunion
24. Adventurer
25. Comfort
26. Waiting
27. Holy World
28. Shirone's Palace
29. Covert Operation
30. No Way!~
31. Tabibito no Uta -EP17 Inst Ver.-
32. Roxy's Thoughts
33. Zanoba's Power
34. An Encounter with Overwhelming Power

Original Soundtrack 2 Special Edition
01. The Depths of My Heart
02. It's Alright Now
03. Prestigious Family
04. Stratagem
05. Objective
06. Ulterior Motive
07. Cheerful Day
08. Third Eye
09. What You Know
10. Plan
11. Hideout
12. Empty World
13. Aisha
14. First Sea
15. Demon Empress Kishirika Kishirisu!-
16. Ghislaine's Matter
17. To Gain Trust
18. Wenport
19. Smuggling Ring
20. Strategy Meeting
21. Power of Smiles
22. Comfortable Prison
23. Newcomers with Seniors
24. The Doldia Tribe
25. Joint Struggle
26. Reunion
27. Adventurer
28. Comfort
29. Waiting
30. Holy World
31. Shirone's Palace
32. Covert Operation
33. No Way!-
34. Tabibito no Uta -EP17 Inst Ver.-
35. Roxy's Thoughts
36. Zanoba's Power
37. An Encounter with Overwhelming Power