Imperial Wheel R4 (GE-JP) has been released for Jan 25-31, 2011. This series introduces 2 new costumes, 3 new Arcana weapons, and Asoka character card. Other rewards include Draconic Bracelet, Elite Arcanero Plate, and Pet Box (Capybara). I personally love the new costumes. Click on image below for enlarged view.
Sword of Strength
Great Sword • ATK Rating 33 • ATK 458
ATK Speed +10% • [Volition] Skill Level +1 • [Ruthless] Skill Level +1
Dagger of Lovers
Dagger • ATK Rating 33 • ATK 196
ATK Speed +10% • [Rapida Ataque] Skill Level +1 • [Chopping] Skill Level +1
Gaiters of Hanged Man
Gaiters • ATK Rating 33 • ATK 161
ATK Speed +10% • [Elemental Kick] Skill Level +1 • [Elemental Dragon] Skill Level +1
River Blanc Costume
Body Costume • Asoka
Azalea Costume Set
Body Costume + Hair • Catherine Torsche
P/S: I just realized they have re-numbered the web game 4 months ago. Instead of Imperial Wheel, it is now Imperial Wheel R. ("R" presumably for Renaissance.) Numerically, this should be the 18th Imperial Wheel release.
For more screenshots, see 1月の新コスが予想通りだった件.