Shinkai, being a Japanese citizen your quickest route to the flight deck is by contacting the Japanese airlines directly. Most Japanese pilots come from the best Japanese universities, are near the top of their class, and have the best scores on the airline exams. Sounds daunting? Once accepted into the airline you will receive full pay and benefits, while in training. ANA owns a huge flight school in California. The most luxurious school I have ever seen: 30 bonanzas and barons, marble floors, beautiful pool, etc. While touring the facility the managers told me that it cost ANA $2 million per student to train from 0 hrs to right seat.
Good luck,
BBB