Abstract
The annual meeting in the last year, I have presented about the strongly negative correlation between April and August mean temperatures in northern Japan. After that it’s becoming clear that the negative correlation might be seen in the minus IPO (Intradecadal Pacific Oscillation) period (around 1998-2013). Also crop productivities in Indonesia are well corresponded with PDO (Pacific Decadal Oscillation) index by means of considering the IPO stages. So, I’d like to present about the role of IPO and then relationships between PDO and crop productivity in Indonesia.