For Haino projects I would say check out Vajra first, which consists of Haino, acid-folk monster Mikami Kan and drummer Toshiaki Ishizuka . Also I think '77 Live is probably the best place to start with Les Rallizes Dénudés, personally I listen to them mostly on YouTube and just pick up any of their records if they are available, I'm not picky with them because I like all they create.

I would say check out this reissue of material from the band Onna, led by manga-ka Keizo Miyanishi. It really is a masterwork of psychedelica [link]

And I'll just give you a generic list of artists, some I like more than others, I'm sure you'll know more than a few too, and I've included some noise acts and a couple of 'acid-folk' artists too for a bit of overkill.

Kousokuya [link]
Abe Kaoru [link]
Shizuka [link]
LSD March [link]
Onna [link]
Ghost [link]
White Heaven [link]
High Rise [link]
Maher Shalal Hash Baz [link]
Suishou No Fune [link]
Aural Fit [link]
Marble Sheep [link]
Angel'in Heavy Syrup [link]
Mikami Kan [link]
Kazuki Tomokawa [link]
Kim Doo Soo [link]
Shuji Inaba [link]

Ground Zero, Merzbow, Masonna, Hijokaidan, Incapacitants, KK Null, Absolut Null Punkt, Zeni Geva, Violent Onsen Geisha, C.C.C.C, Solmania.

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Give us adequate images, we lack adequate images [link]