on iTunes and in the top five on Chaku-Uta full song downloads. The Original Version went on to stay at number one at iTunes Japan until April 20, 2007, when Spitz's Lookin' For took the position. Airplay "The "Flavor Of Life -ballad version-" aired on radio in Japan on January 15, 2007, the same day as the release of the PV. The song has since reached the top ten airplay rankings of various FM Japanese radio charts. On MUSIC LOUNGE radio in Japan "Flavor Of Life -ballad version-" reached the number one ranking. On February 19, 2007, the original version of "Flavor Of Life" was aired on the radio. For the first week of airplay, "Flavor Of Life" faced lower airplay than Ayaka and Kobukuro's "WINDING ROAD", peaking at number 2 for composite FM airplay. However, "Flavor of Life" overtook WINDING ROAD on FM airplay the next week. Physical sales February 28, 2007 brought the release of the single, garnering buzz on Mixi for purchases. However, some bloggers reported the single was out of stock when they checked the store. Later it was confirmed that some sellers had already begun running out of the 400,000 initially shipped singles, just before "Flavor of Life" took number one on the Oricon dailies for February 27. Despite tough competition from break out artists Ayaka and Kobukuro, Utada was confirmed to have taken the number one position on the Oricon with only the first day sales. Oricon reportedly stated that she "checkmated" her competition. On the second day of Flavor of Life's sales, the Oricon updated their daily charts to include indices for each day. Only a log of one week of these numbers was created, but for the known days, Utada has exceeded Arashi's "Love So Sweet" every day. Altogether, her index total for three days came to 87,898; the actual sales for these three days was much higher. Livedoor published an article using a factor of 1.81 to determine a suitable estimate for sales; if this was true, "Flavor Of Life" sold about 160,000 copies in just three days, outselling "Be My Last"'s total sales of 150,000, which made this single her best selling since "Dareka no Negai ga Kanau Koro" in only 72 hours. On the fourth day of sales, the index rebounded from 18,161 to 19,669. This single's sales rise continued for the rest of the week, once more peaking