Does Japan have planes?
Does Japan have bombs??
Does Japan have balls??? ....................Yes, All of the above. Like the USA in WW II they can switch production very quickly. You might say, they like to do things in secret, but you can bet, the detailed plans are on the table. Think about it, what nation in the world went from feudalism to a modern nation at such a rapid pace as Japan. They make the rest of the 3rd world look stupid by comparison. LOL, they look after themselves very well, no diversity there, all yamato. BTW, there are no refugee problems for them. If they feel threatened, watch out!
As they should.
The OTHER guy is constantly trying to 'know your enemy'; too.
Even the now 'friend' that may BECOME your 'enemy' in the future.