Hello everyone!

I've just compiled a list of threads outside of /nihongo/ that might be interesting to Japanese visitors of 4-ch.
Since I don't know what Japanese visitors might generally be interested in, I just did a little search on everything that is somehow related to Japan or 2channel. Kinda generic, I know. ( ´−｀)
There might be more threads on 4-ch that could be interesting to Japanese visitors, especially on /anime/, /manga/ and /ascii/ but I suggest you just have a look there for yourself!

Here goes:

/food/

• Japanese recipes

http://4-ch.net/food/kareha.pl/1111370450

• Natto 納豆　Japanese food

http://4-ch.net/food/kareha.pl/1103489597

• Japanese Food

http://4-ch.net/food/kareha.pl/1102228744

• Crazy Asian vegetable thing

http://4-ch.net/food/kareha.pl/1104299880

• MelonPan

http://4-ch.net/food/kareha.pl/1102638755

/games/

Video games, online games, board games, mind games.
Here are just two threads directly related to the Japanese
gaming market, but you might find other threads interesting to you:

• Comiket 67

http://4-ch.net/games/kareha.pl/1104506981

• Visual novels or dating sims

http://4-ch.net/games/kareha.pl/1105242533

/music/

• DENPA

http://4-ch.net/music/kareha.pl/1111380719

• I've Sound

http://4-ch.net/music/kareha.pl/1102200691

/news/

• A new Japanese law that violates freedom of speech

http://4-ch.net/news/kareha.pl/1110058459
Corresponds with the other thread in /politics/

• Japan may fly to the moon by 2025

http://4-ch.net/news/kareha.pl/1109630050

• [news] Lolicon Backlash in Japan

http://4-ch.net/news/kareha.pl/1105816721

• Green cars are Japanese

http://4-ch.net/news/kareha.pl/1102462015

/net/

• CATMAN

http://4-ch.net/net/kareha.pl/1104331331

• "Trainman" (Densha Otoko), a story born on the net, adapted into manga by 4 competing magazines.

http://4-ch.net/net/kareha.pl/1104671331

/politics/

• Japan's LDP proposing new, authoritarian constitution

http://4-ch.net/politics/kareha.pl/1109699297
Interesting discussion about recent major developments of Japan's constitution.
Some Japanese have already contributed to this thread.

• china's anti-secession law

http://4-ch.net/politics/kareha.pl/1111002137
This thread may not be about Japan but since it's about some of Japan's
most important neighbours, you might be interested.