ジャパメタ（japameta, Japanese metal, BEAT OF JAPANESE METAL MOTION） is focused on Japanese HR/HM. Actually to some bands the only contributor likes enough to free‐up some time to update.
Although the URL structure is rather clumsy and it is maintained by only one web master (ユキyuki) It holds very interesting and useful information on that bands.

Here is the list of bands.

• Those bands have their own page like TERRA ROSA.
• Many many bands don't have their own page but until then can be linked, like AxBites for their edition details and reviews (permalinks are tricky to find on these pages themselves, look for them in the review index instead).

japameta only has Artist type page (example above TERRA ROSA).

※ Off topic, here is a funny band activity timeline.