In the spirit of sticking with a good thing, Yuraku have a longer, more chocolate bar-ish chocolate bar called VOLT (almond) that basically is their star Black Thunder product in a different shape and with almonds thrown in. You can find the VOLT tucked in with the cheap chocolate snacks, even though it tends to be 100 yen, and it is pretty nice. With liberal amounts of crushed almonds and biscuit pieces, the chocolate still manages to be quite smooth despite the crunch. While I’m not sure if they meant to call them VOLT as in electricity, or if they meant thunder BOLT and romaji failed them, I can confidently say that they’re quite enjoyable, anyway!
Chocolates of Japan 