^Not consecutively though.
Singles
01 NEWS - 230k (8th consecutive #1, tied with Hikaru GENJI for the 2nd most #1 consecutive singles starting from debut)
05 Jero - 36k (1st time in 25 years for an Enka single to be in the top 5 for the first 2 consecutive weeks)
Albums
01 BoA - 111k (6th consecutive #1, 2nd most female #1 studio albums starting from debut)
09 Janet Jackson
10 Michael Jackson
NEWS:
http://www.oricon.co.jp/news/rankmusic/52538/
Jero:
http://www.oricon.co.jp/news/rankmusic/52536/
BoA:
http://www.oricon.co.jp/news/rankmusic/52540/