It will really depend on your purpose in visiting Japan.
The Japanese Embassy in Manila will also look at your itinerary so putting expensive items on it is not a good idea if you don’t have that much money to spend.
Generally, an average of 7,000 to 10,000 pesos per day in Japan is safe enough to be able to get a visa, however, it is a bad idea to put an immediate big amount of money just to show that you have a good bank balance.
Why? Because it won’t help increase your average annual or monthly balance and the embassy can verify your transactions anytime with your bank branch. Just be careful on your bank deposits.