Werner Herzog is in Tokyo Ga?

Yes, Herzog makes an appearance. Not to give away much of the movie but Wenders runs into Herzog in Japan and Herzog offers commentary on society/civilization and such. He's interviewed for about 5-10 minutes if I remember right.

This is from the Senses of Cinema writeup on Wenders by Dave Tacon:

True to Wenders' statement that his “American phase” was over, his next film, Tokyo-ga (1985) took him to Japan in search of any remnants of the old Japan (that he felt was disappearing) as depicted in the films of Yasujiro Ozu, who had died 20 years earlier. During this pilgrimage of sorts, there are a number of bizarre sequences showing such uniquely Japanese occupations as hitting golf balls on multi-story driving ranges, the meticulous preparation of plastic models of food for window display and the Zen pokie-like pachinko parlour. The film also features a monologue/conversation with Werner Herzog on top of the Tokyo Tower, with Herzog considering applying to NASA to continue his increasingly difficult search for “adequate images”. The strangest of all sequences, however, is undoubtedly footage of Japanese rock 'n' rollers in outfits straight out of the 1950s practising their dance steps to a ghetto blaster in public park—perhaps inspiration for fellow Ozu-fan Jim Jarmusch's Japanese characters in Mystery Train (1989). The film ends on a particularly touching note with Ozu's long-time camera assistant, Yuharu Atsuta who had loyally worked with Ozu since his days of silent film before finally earning the position of cinematographer in 1952. His heartfelt reminiscing of his hard taskmaster to the point where his emotions overcome him is unique and moving—one could not imagine another cinematographer who could be so heartbroken by the death of a director that they are unable to work again.

Yes, he's not in it for very long, but it's pretty much the most fascinating bit in the whole movie for me at least.

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