The Yahoo! Japan blog "Cyber Gundam" have published the specific Japanese release dates for some Transformers items between April and June. The items are basically the new pre-orders that Big Bad Toy Store listed recently, but this time Japanese retail prices are available.
24th April 2010 - Transformers EZ Collection Vol. 3 - TBC yen
24th April 2010 - Transformers RA-31 Mudflap and Agent Simmons - 5,000 yen
29th May 2010 - Transformers Alternity A-04 Okamora Orochi / Starscream (white) - 4,500 yen
29th May 2010 - Transformers Alternity A-04 Okamora Orochi / Skywarp (purple) - 4,500 yen
29th May 2010 - Transformers Device Label Transformers USB Flash Memory (2GB) Cheetor - 3,800 yen
26th June 2010 - Transformers Disney Label Buzz Lighyear Spaceship - 3,800 yen
26th June 2010 - Transformers Movie MR-01 Jet Power Optimus Prime - 6,800 yen
26th June 2010 - Transformers Movie MR-02 Megatron - 4,200 yen