Option traders has informed me, that there are relatively large 90.00 and 90.50 vanilla option expirations today, mostly at the NY cut. Some specs could be doing some USDJPY buying on the back of these positions, thus the grind higher that we have seen in Asia today.

Japanese technical traders will be looking at the hourly ichimoku kijun line which shows resistance just above 90.00. More resistance is seen at 90.50 where the daily ichimoku kijun line comes in at.