Questions are good! They make me feel like you're actually interested instead of just being "tl;dr"! XD
Taichi is indeed the host of SCP. Although I find he comes across somewhat differently there than he does usually. He's a bit less charming on SCP - I think it's a kouhai thing. XD I think he's more like himself when people from his generation are the guests.
Leader. . . TOKIO all really mess around a lot during Countdown, although Leader actually seems a bit less likely than the others to do so. This most recent one? Leader sang Miso Soup at the recent one, and Mabo had a ridiculous brown mohawk. I can't remember anything else in particular that the others did. . . but if there's a certain incident you can name I'll definitely check it out! (I love Countdown, so any excuse to watch it again!)
Re: Sorry for the questions...! I'm trying to get them somewhat straight in my head...
Taichi is indeed the host of SCP. Although I find he comes across somewhat differently there than he does usually. He's a bit less charming on SCP - I think it's a kouhai thing. XD I think he's more like himself when people from his generation are the guests.
Leader. . . TOKIO all really mess around a lot during Countdown, although Leader actually seems a bit less likely than the others to do so. This most recent one? Leader sang Miso Soup at the recent one, and Mabo had a ridiculous brown mohawk. I can't remember anything else in particular that the others did. . . but if there's a certain incident you can name I'll definitely check it out! (I love Countdown, so any excuse to watch it again!)