Games played by Kenshou Koseki (Aomori, Japan) in this fuseki

25
1
3
4
4bw
+ 1
=  
-3 
?  

1Tsushima Norito - Koseki Kenshou
2Koseki Kenshou - Kobayashi Koichi
3Koseki Kenshou - Tanno Yoshitaka
4Koseki Kenshou - Tanno Yoshitaka