Complex sentence: At that time, the channel was only available on Indovision and OkeVision, but on June 1,2014, WakuWaku Japan became available on Transvision, OrangeTV, BiG TV, and First Media.
Split into simpler sentences: At that time, the channel was only available on Indovision and OkeVision. On June 1,2014, WakuWaku Japan became available on Transvision, OrangeTV, BiG TV, and First Media.