JASRAC. work importer/editor into MusicBrainz + MB-JASRAC-音楽の森-NexTone links + MB back search links
One click imports JASRAC works into MusicBrainz (name, iswc, type, credits, edit note, sort name, search hint) and マス歌詞®（mass-lyrics） and wikipedia links. It will do the same magic in work editor. Work links to both JASRAC and 音楽の森 / ongakunomori / music forest / minc / magic db and back to MB
(description from source code)
Most features are currently unavailable, see bottom of the post for Current main issues.
Continuing the discussion from Work Identifier Codes:
The script that did that is jasrac-mb-minc_WORK-IMPORT-CROSS-LINKING (click Raw to install).
It used to import everything about a work (attributes, relationships and aliases), when either adding or editing.
But, after MBS, and then even JASRAC changes, it now does not do much, unfortunately (check out the known issues).
Current Main issues
RAAAAH !! (ノ ゜Д゜)ノ 彡┻━┻
It became impossible to seed MBS work page by
POST, so aliases support has gone. I had to choose between JASRAC ID and aliases.
I don’t remember why, maybe since a MBS work edit page revamp.
Now JASRAC ID are work attribute (good) but are not searchable (bad)?
This script has been partially fixed now but is back to VERY EXPERIMENTAL status!
Work credits are back on import (not on edit yet).
Aliases are still disabled (maybe forever?).
Due to a complete JASRAC site revamp.
Which probably broke even more features (import restored without relationships).
Most cross-links might be broken
Due to MINC site revamp.