Nooobz have released a new version of the 3.50 Downgrader with Support for the Jap Version of Lumines, heres the release news:
As promised, we've completed the HEN and downgrader for
Japanese Lumines. This will work for both ULJS00005 (the original
Lumines) and ULJS19005 ('The Best' version). In fact, both versions are
identical - even so far as using the same SAVEDATA folder.
The new package, containing support now for US, EU and JP versions can be downloaded below.
Please note: 0okm, in conjunction with HellDrive, has also released a
port of HEN to Japanese Lumines, on his blog . Our version was created
independently, but we can confirm that both versions work fine.
Congratulations to 0okm on his speed, I just wish we'd noticed that he
had done his before we worked on ours!
Major thanks are also due to Daimaou and BDIGITAL for providing us with their Japanese UMDs to work with.
Download here.
Source: PSP News