you have to get them from outside, they usually have a dumb and inefficient system in the landing page for ToraCoins, Code Sales sucks, it takes so much time to get anything, just like when they used TokyoOtakuMode, the go-to place to get the points is either getting Bitcash cards in Playasia (its a bit more expensive) and/or SEAGM that their commission per card is really smaller, at the same time, SEAGM way of doing things for first buy is horrible, and got banned becasue there was an issue between their processor and my bank and too much tries in small time. So yeah, my go to is Playasia, no waiting time, they give you a code in hiragana you give that to ToraCoin Bitcash in a very hidden place, and the ammount of Tora is yours.
Only thing to have in mind is that you can buy a 20k yen, you will have to do put the hiragana code two times as their system only accepts 10k or 30k, but the bitcash cards do save how much you have spent so nothing is lost. Fantia not too long ago also upped the amount of tax they take cut, so usually you have to go and but an 10k and a 1k cards to get the right amount of ToraCoin.