Yaegashi has had a career of hard match up's and was stopped by Roman Gonalez last September in an enthralling Flyweight and was subsequently stopped by Pedro Guevara in a December Light Flyweight title fight. With that in mind it seems hard to really slate him for an easier bout, especially with this contest being his Super Flyweight debut after having fought as low as Minimumweight.
The long term hope for Yaegashi is to claim a Super Flyweight world title, and become a 3-weight world champion. At the moment that's looking to be a pipe dream though we'd love to see Yaegashi achieve it considering the great career he has had and the great nights of action he has given us.
In regards to Songseanglek he has twice fought in Japan with a 2013 loss to Carlos Cuadras and an opening round blow out loss last year to Ryo Akaho. Sadly those losses are the glaring ones and are his only bouts against world class fighters. Notably however we have been told that his boxrec record, which is listed as being 1-11, is incomplete. That's unfortunately the case with a number of Thai's who often have bouts that go unrecorded on boxrec.
(Image courtesy of http://www.ohashi-gym.com)