Roughly 70 percent of all videogame software and hardware sales in Japan are for Nintendo platforms at present, according to the latest sales data from Japanese industry analysts Media Create.

The company said that this is the largest share of the market Nintendo has held in the past five years.

In noting Nintendo's current market leadership, Media Create observed that overall video game sales during the month of August were down. Media Create compared sales over the cultural holiday of Obon (which last about two weeks) to years past and found that 2012 sales were 90.32% of 2011 Obon sales and 93.59% of sales over the same holiday in 2010.

Nintendo's hardware dominance is a fact of life in Japan, as the Nintendo 3DS has consistently sat atop the hardware sales charts for the past year. The recent release of the 3DS XL model has only strengthened Nintendo's lead. Add in the lingering Wii and DSi sales and Nintendo products account for about 75 percent of all hardware sales in the country. Sony represents a little over 23 percent.

On the software side, the top ten games sold in Japan last week were all for Nintendo consoles. New Super Mario Bros. 2 was the best-selling of the bunch, nearing the one million mark.

More good news for Nintendo is the MMO Dragon Quest X Online, which in its third week remains a strong seller for the Wii even if it lags behind traditional Dragon Quest games in popularity. In total, 69.74% of all software sold last week was for a Nintendo console versus 29.18% for PlayStation consoles.

What of the Xbox 360? It retained its usual last-place position, selling fewer than 1,000 units last week. Its only game in the top 50 was Monster Hunter Frontier Online, in 28th place.