Oh shit, Miki Dozan died 2 years ago!!!?!?! WTF?!?! I can't beleive, as closely as I follow the hip-hop & reggae scene especially that somehow passed me by. His Lifetime Respect album still gets spins in my stereo from time to time. Damn, I'm shocked to hear that. I too was wondering what happened to him.
Reggae music in Japan has been around since the late 80s (along with hip-hop), and reggae dancing goes back to the late 90s. But it didn't explode to the levels of popularity it is now until about 2001. After Junco captured the queen title in Jamaica in 2002 it got SUPER popular. Now, there are reggae dance school all over the country with hundreds (and growing) professional reggae dancers (I'm not including chicks that just learn some steps and then hit the clubs, I'm talking about the ones that are deeply rooted in the culture, get featured in music videos, and often enter into national/international competitions).
Right now I'm close to the 70 mark in terms of DVDs I own featuring reggae dancers from Japan. I have every single one & g DVD, and all semi-big label reggae dancer DVDs. Nowadays I'm getting the very underground ones that you have to special order or be at attendance for these dancer events at clubs. All the DVDs you mentioned above I own, but I could recommend some to you that you may not have heard/know about.
Sono is tight in Foxy Bull man, but I prefer Asami (her partner) since her style is more subdued and a little more precise. Sono is wilder though, so I get the appeal You may already know this, but Sono ranked 3rd in Dancehall Queen Japan competition last year (personally I felt Hardcore J got robbed of 3rd place, but hey I'm not an expert like the judges are), so big up to her.
If you have any questions about this topic, or would like some recommendations, I'm sure I could hook you up. My wife has only recently gotten into my obsession with reggae dancers and has started to learn the moves herself.