Well, the April result is out and Japan’s exports were not doing that well even though Yen has been pretty much trading above 90. Japan’s trade deficit swelled, highlighting the concerns about the efforts to revive the world’s third-biggest economy.
Yen has been floating above 90 since January. Maybe 4 months are too short to see the result yet, but weaker yen should definitely help. Just look at the U.S. economy, it’s been 4 or 5 years now, and it still shows little improvement.