Games played by Hirouji Sakamoto (Osaka, Japan) in this fuseki

5
42
1
3
4bw
+2 
= 1
- 1
?  

1Kubo Izumi - Sakamoto Hirouji
2Oosumi Yuuki - Sakamoto Hirouji
3Sakamoto Hirouji - Kon Akira
4Sakamoto Hirouji - Miyagawa Junzo