Loved your blog posts, Jpope. Similar to how I felt about Kobushi. I'm nervously curious about what they will actually end up doing with Rei.
I was thinking about Kobushi, and was comparing them in my mind to their "spirit group," Berryz. I felt like Berryz got so much more in their first 5 years than Kobushi has gotten (no doubt thanks to the massive loss of members.) And so I did go and look at info to directly compare the two.
In the span of 5 years, Kobushi vs. Berryz
8 singles (17 songs) vs 19 singles (close to 20 singles)
2 albums (18 non-single original songs) vs 5 albums (34 non-single original songs)
7 concert DVDs vs 10 concert DVDs (these are not including Hello cons)
2 stage plays vs 4 stage plays
Of course there's tons of other comparisons you could make, but I was mostly curious about songs/content.