The first episode of "Kagi no Kakatta Heya" starring Arashi leader Ohno Satoshi, Toda Erika and Sato Kochi achieved a high rating of 18.3% for its debut on air on 16 April. This makes it the 2nd highest premiere rating among the spring drama offerings so far with Ataru bagging the first place with a rating of 19.9%.
This is also higher than the previous season's drama in the same timeslot i.e. "Lucky Seven" starring Matsumoto Jun also from Arashi which got 16.3%.
It can also be noted that Sakurai Sho's drama, Nazotoki wa Dinner no Ato de which had an average rating of 15.9% and aired every Tuesday from October to December of last year had a first episode rating of 18.1%
Kagi no Kakatta Heya is Ohno Satoshi's first getsuku drama making him the second member of Arashi to star in a Monday night 9pm drama.
Source: Doramaworld Excite News
Congratulations to all the staff and stars of KagiHeya for a successful first episode. It also became a treding topic in twitter that time! Here is to hoping that the rest of the season would be good for ratings wise for Leader's first getsu9.
Edit: Aiba's last drama series with Fuji was way back in 2001 for Mukodono! which had a first episode rating of 16.5%. Ninomiya Kazunari's Freeter, Ie o Kau aired on Tuesdays nights last 2010 had a first episode rating of 17.6%.