Japan limited release for e-Hobby Shop only. Pre-order has started since yesterday (March 24th), and will end on April 26th.
Two release dates at the moment - not sure which one is official: end of August (e-Hobby Shop), mid September (Takara Tomy).
The price is 4,725 Yen (inclusive of tax).
This Transformers figure will be an event limited release for a Transformers event to be held in Shanghai by the end of July, according to Takara Tomy.
Images and information are from e-Hobby Shop and Takara Tomy