(More or less) interesting links:
 

"Hiking in Japan"-related pages:
Paul Hunt web-page (author of "Hiking in Japan" - visited our club in June 2006 (see report))

A dutch database on trails (home page)
A dutch database on trails (Japan page)
The Chubu Hiking Page
Yuuko Yamaguchi's Climbing Page (many links of hiking clubs in Japan)
Outdoor Club Japan (OCJ) - Tokyo Hiking / Climbing Group, for Japanese and foreign people.
"Outdoors Japan "
Japanese Alpine Club
Yahoo.com: Outdoors Japan
International Adventure Club Tokyo
International Outdoor Club Kansai

Info on climbing Mt. Fuji

Weather pages:
Tsukuba weather(weathernews)
Japan weather pinpoint (weathernews)
Japan Weather Association
Japan Weather Association (1 week forecast by area)
Japan Weather Association (satellite images)
Tokyo Broadcasting System
Asahi Weather (Japanese)
Typhoon information (Asahi Weather) (Japanese)
CNN Weather
CNN Weather for Mito
Yahoo Weather (Japan)

Sunrise and sunset times in Tokyo

Traffic information
Tokyo metropolitan highway,
Ibaraki prefecture,
list of all regions (Japanese)

Train timetables and prices (Japanese)

Maps of Japan:
Japan Tourist Organization
MapFan (very detailed, but Japanese)

Local interest (Tsukuba area):
TAIRA community (host of our web page)
Tsukuba Alien Times website
Tsukuba city home page
Tsukuba page at the National Land Agency of Japan
Tsukuba Science City Information (detailed bus and train schedules in English)
Tsukuba Botanical Garden
JR Bus Kanto Time Table (Tsukuba-Tokyo and all Japan)
Tsukuba Express (Japanese)