Lord of the light flies in Japan = global 108lb emperor?

We've got three nihonjin at 49 kilograms who between them hold just half of the major sanctioning org world titles currently - but well over 90% of the division's prestige. Kenshiro Teraji holds the green belt, wresting it back from Masamichi Satô by stoppage this past March in their rematch after having been stopped by "Yabuki" for it last September. Hiroto Kyōguchi, meanwhile, just "unified" his WBA super world light flyweight championship with the so-called regular championship previously held by Esteban Bermúdez Salas after emphatically defeating the Mexican.

Now - among this little trio, who is the best h2h, and does that person have what it takes for a run at undisputed status? Do we need a Teraji vs. Satô III, followed by Kyōguchi versus the winner, to determine who the man at the weight in their country (and very likely thereby also the world) is? Does that person then even need to bother chasing the Jonathan González vs. Mark Anthony Barriga winner to assimilate the WBO? Should they defend against Daniel Matellón or Elwin Soto to solidify their claim? Félix Alvarado was a formidable titlist until a few months ago, when he vacated his IBF strap to pursue opportunities up at flyweight proper.