Nintendo’s spiritual successor to Mario Party — Wii Party — is off to a sound start in Japan. Retail tracking estimates courtesy of Famitsu, the editorial arm of Enterbrain, show that 66,000 units were shifted on launch day.

That total is divvied up between a Wii Remote bundle package and a software only offering, the latter of which took the lion’s share of sales at around 52,000 units.

At its E3 2010 press conference last month, Nintendo confirmed that the title is headed stateside later this year. Chances are it’ll have no problem winning over consumers, taking into account how well previous Mario Party efforts sold. Besides, any Wii prefixed title is guaranteed to sell by the millions, as even the decidedly vapid Wii Music has proved.

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Read more: Nintendo Reveals Wii Party,  Famitsu Sales Figures: PS3 Outsells Wii In Japan,  Super Mario RPG Hits Japanese VC In June,  July NPD: Industry Sales Remain Sluggish, Wii Sports Resort Leads Software Sales,  Nintendo Calls DS ‘The Nation’s Best-Selling Video Game System’