There is special even on the weekend during the period of Matsuri.
Daffodil Masuri at Kasai Park (葛西臨海公園水仙まつり) is held in early January to the mid February. There are over 200,000 Daffodil flowers planted at the special garden. It is the largest Suisen, Daffodil, spot in Tokyo Metro.
Tourist Info.
There is parking and restroom.
Admission:Free
Period: early January to the mid February.
Access
0. at Tokyo Station.
1. use JR Keisei Line to Kasairinkaikouen.
2. walk west.
30 min
Let's learn MJER Iaijutsu. 
映画好き集まれ！