Oh boy, I have some things for you OP (and everybody reading this). But I have to look over my bookmarks so I won't be posting all of my resources until next week. I'll post a few today:
>http://www.hardcoregaming101.net/
Unfortunately, there are some Western games on here (including modern ones), but the site was originally dedicated toward old JRPGS (and some other japanese games that aren't rpgs). You can find of tons of reviews on obscure games that you may have missed.
>https://tcrf.net/The_Cutting_Room_Floor
This site also isn't Japanese centric but it is a very good one for unearthing secret easter eggs or unused content in games.
>https://dreamcastify.unreliable.network/
Very in-depth blog that shows the difference between Sonic Adventure 1 Dreamcast and DX ports.
>https://kantopia.wordpress.com/
(Mostly) Fire Emblem translation blog. Contains newer titles but also (mostly) the old ones.
>https://themushroomkingdom.net/
This has got to be my favorite on the list. Site has existed for a long time (1997) and has that look that is reminiscent of the early-mid 2000's. This site is dedicated to all things Mario. You can find some translations here too!