づ/ヅ=du, を=wo, っ/ｯ : There are 2 ways to type small つ (=っ). 1. It's whatever consonant follows. For example よかった　is yokatta, the extra 't' coming from the small tsu. (かってい = kattei, いっぱい = ippai) 2. You type an x before the tu or tsu to type small つ (=っ).