Sources: as usual Anison.info, Japanese Wikipedia, JASRAC database:
http://anison.info/data/source/10902.html
https://ja.wikipedia.org/wiki/%E7%89...82%BF%E3%83%BC
Plus credits for composers and arrangers from the album's booklet "Tokkei WINSPECTOR ORIGINAL SOUNDTRACK":
https://vgmdb.net/album/70196
About the insert/image songs, once again I prefer to use the infos from Japanese Wikipedia, which gives the episodes where the songs are used; Anison.info often gives false information about this.
I also added artist pages for Noboru Sugimura/杉村升, Kyoko Sagiyama/鷺山京子 and Mami Nakanishi/中西真美.
I still need confirmation for the romanization of these artists:
- The lyricist 宇都宮恭三: Kyozo Utsunomiya?
He's known as producer of several tokusatsu and anime TV series.
http://www.drillspin.com/person/view/ARDSAX062428
http://www.allcinema.net/prog/show_p.php?num_p=118827
Drillspin gives Kyozo for the first name, but it can be Kyouzou too.
- The singer 山下優: Masaru Yamashita, or Yu(u) Yamashita?
He played Ryōma Kagawa (the main role) in Tokkei Winspector.
DrillSpin and Artist.cdjournal say Yu Yamashita:
http://www.drillspin.com/person/view/ARDSA0832885
http://artist.cdjournal.com/a/_/832885
And Japanese Wikipedia says Masaru:
https://ja.wikipedia.org/wiki/%E5%B1...B8%8B%E5%84%AA
Other less reliable websites say Masaru too:
http://www.imdb.com/name/nm1139354/?ref_=nmbio_ql
http://metalheroes.wikia.com/wiki/Masaru_Yamashita