Do you care if it's Japanese or not? I would recommend:
An Autumn For Crippled Children (depressive black metal, black metal, atmospheric black metal, doom metal, blackgaze, post-black metal)
Gnaw Their Tongues (noise, black metal, drone, experimental, industrial, dark ambient)
And Boris is a good Japanese one (drone, stoner rock, sludge, experimental, doom metal, noise rock, Psychedelic rock)
Dum Spiro Spero just so happens to be my favorite DIR EN GREY album. There are actually many more bands I could recommend but the 3 I mentioned above are good starting point that should lead you to discover similar bands. If you need anymore recommendations of this sort though let me know I have many.
And you know what I'll also give you another Japanese band Envy (screamo, post-rock, post-hardcore, hardcore)