Hey Cooool and I thought I had nearly everything from the 70's. Now I can hunt more stuff,great..Does somebody already know where to buy these movies?

In know what you mean carlo. I assumed that I was aware of all the major 1970s automotive films but there seem to be a few relatively unknown gems still out there.

I would try Yes Asia. They carry Japanese films as well.

I haven't found any shop to order one of those movies mentioned in this thread. I think it is going to be a challenge to find a online-shop I can read in english where I can order unknown japanese b-movies from the 70s. On my search I found shops that import and offer many asian and japanese movies.

www.cinemasie.com
www.hkflix.com
www.cdwow.net
sensasian.com
www.play.com
dddhouse.com
www.kurotokagi.com
www.eastwestdvds.de
www.adrenafilm.de

These are the names of the 4 Yakuza Deka movies. The first 2 titles are available. I haven't found the 4th yet but came over an additional translation Yakuza Cop via google books.

1) Yakuza deka (1970) - Gangster Cop
2) Yakuza deka: Marifana mitsubai soshiki (1970) - aka Yakuza Deka 2: The Assasin
3) Yakuza deka: Kyôfu no doku-gasu (1971) - aka Yakuza Cop: The Poison Gas Affair
4) Yakuza deka: Oretachi ni haka wa nai (1971) - aka Yakuza Cop: No Epitaphs To Us

I found a videoclip, filmposter and screenshots...
Boso panikku: Daigekitotsu (Violent Panic: The Big Crash) 1976
sangreyakuza.blogspot.com/2010/01/boso-p...gekitotsu-kinji.html

It seems that Hairpin Circus is available at Amazon Japan.Don't know if Regioncode 2 is the same as for Europe.

Japanese region code 2 should be the same as European region code 2 carlo. You can check on this wiki page.

Only other issue is if your TV and DVD player has NTSC playback ability since I think most Japanese DVDs are in NTSC format.

Thanx for the info,NTSC is no Problem; So I will try to hunt down those Jap DVD's.