It is a national holiday called Umi no hi (海の日), Marine Day. It used be on July 20, but it has become on the third Monday of July since 2003 to have a longer weekend.
I went to Asagaya (阿佐ヶ谷) again to visit some shrines. There was the Yaegakisai (八重垣祭) festival at Shinmeiguu (新明宮). So I visited there first to get the special red stamps called goshuin (ご朱印) and a specal gold band only sold at a special occasion called Kanmusubi (神むすび) meaning knot with god.
Then I visited Mabashi inari jinja (馬橋稲荷神社) shrine, and Sarutahiko jinja (猿田彦神社) shrine, and Koenji (高円寺) temple in the area and came back to Shinagawa (品川) to visit Shinagawa jinja (品川神社) shrine.
The aim of visiting these places today was to see the main gate called torii (鳥居). In their gates two dragons were carved. One goes up, the other comes down. There are only three places which have this kind of gate in Tokyo. They are called Tokyo san torii (東京三鳥居), three torii gates in Tokyo. So I visited them all today.
In the evening I watched the movie "Pirates of the Caribbean Dead Men Tell NoTales" in Yokohama with my colleague to celebrate her birthday.
It was a nice holiday.