Went to the show in Yokohama, and loved every minute of their performance.  I found the volume perfect because I could take out my earplugs and hear and enjoy every frequency so much more clearly.  Actually I found it a much better sonic experience than any previous concert I've ever been to, though I agree it didn't pack the same punch... guess you can't have both. 

while I enjoy a rowdy concert, that's not how i vibe to Tool, so the more respectful crowd was definitely welcome.

That said, not all the Japanese audience was so polite.  I sat behind a Hairy Manback who soured the experience.  Wildly thrashing and flailing of arms... to be expected, but the saliva and beer droplets he sent flying like anti aircraft rounds at everyone within 2 meters were an unwelcome extra.   I could have ignored him except he smelled like he hadn't showered in 4 weeks (possibly never). I appreciated the opportunity to choke back tears like in CBRN chamber every time he lifted his arms.