Japan Ministry of Finance's Asakawa weighed in earlier in the session:
He's back on it again as USD/JPY tics around its session high
- will take appropriate steps on FX if needed
- FX moves are very volatile, I am worried
- G7 and G20 have confirmed cooperation on FX is possible if needed
- Excessive FX moves are undesirable for stable economy
- shrinking US-Japan spreads is one reason for yen strength