Ryuou no Oshigoto volume 16 read:

With perfect timing, I completed reading the latest volume of Ryuuou at the same time I completed sorting my 1-star music into vocals and instrumentals.  The most recent book features Ai Hinatsuru with short hair, but she's still spectacularly beautiful, and the kimono of course helps.  Ai wins the Women's Legend title and achieves her dream of becoming a professional shogi player.  Her next goal is to compete with Yaichi in the world of men's pros.  She's only 11 so it might be a while before she gets there, but I believe she can do it.  She's a prodigy who can clearly do anything and go anywhere.

Unfortunately for Ai H., she's just a human playing shogi and drawing upon her brain for ideas.  Her rival, Ai Yashajin, has forsaken her humanity and plays based on the moves taught to her by a supercomputer, stronger than any human could ever hope to be.  I'm sure the two will clash somewhere down the road as the tale continues.  But for now Ai H. can enjoy her hard won dream.

Ginko doesn't appear anywhere in the volume so the book turns out great.

As for my music sorting, 1-star instrumentals are 819 songs lasting 1.2 days of playtime, while my vocals were 281 songs lasting .78 days, for a total of a .42 day gap, .03 fewer days than the 2-star tier.  So in truth vocals held their own throughout my entire five tiers.  Vocal songs tend to be much longer than instrumentals, so 281 songs are almost as long as 819, crazy as that sounds.

All in all, Instrumental songs are 3629 lasting 7 days.  Vocals are 1871 songs lasting 5.4 days.  This means the total gap between the two groups is only 1.6 days.  Not only is the 5-star tier perfectly balanced between the two types of music, the entire music hall of fame is pretty balanced too.  This is mostly due to video game composers being unable to resist some sort of Gregorian chant like background chorus being inserted into every other composition.  It's like trying to keep your hand out of a Doritos bag or something.  Just -- one -- more -- epic -- chorus -- hymn !  Humorously enough, going by this, the best vocal music really is inarticulate humming.  >.<.