Suwa City, Nagano.
year  mm days north south W.D.  C.Z.  Observer
2006, 01, 25, 9.5, 15.0, 24.5, 10.8, Watanabe
2006, 02, 10, 2.3, 5.7, 8.0, 2.4, Watanabe
2006, 03, 22, 3.8, 11.9, 15.7, 6.8, Watanabe