The Military Balance around JAPAN

No one hopes that a war break out. However, there are areas where a war or a battle has broken out or being tensed in the world.
Japan is surrounded by seas, so we are more likely to be attacked from the sea or the airspace than the ground.
Russia,China,DPRK....There are dangerous(in various meanings) countries around Japan.
Russia has Mig29series, Su-27 series, which are as strong as F-15series, and stealth fighters called T-50.

Please check out the video below.

By the way, F-X was decided at last. Japan has decided to introduce F-35s to make up F-4J's retirering.

Here is a picture of  F-35.

However, Is that stealth fignter jet delivered on time?? Please tell me if you know when they are delivered for Japan.