April 13, 2019, Tokyo, Japan - Japanese Prime Minister Shinzo Abe (C, L) accompanied by his wife Akie (C, R) smiles with entertainers as they pose for photo at a cherry blossom viewing party hosted by Abe at the Shinjuku Gyoen national garden in Tokyo on Saturday, April 13, 2019. Some 18,000 guests including 200 entdrtainers enjoyed an annual garden party to see fully bloomed cherry blossoms. (Photo by Yoshio Tsunoda/AFLO)

April 13, 2019, Tokyo, Japan - Japanese Prime Minister Shinzo Abe (C) smiles with entertainers as they pose for photo at a cherry blossom viewing party hosted by Abe at the Shinjuku Gyoen national garden in Tokyo on Saturday, April 13, 2019. Some 18,000 guests including 200 entdrtainers enjoyed an annual garden party to see fully bloomed cherry blossoms. (Photo by Yoshio Tsunoda/AFLO)

Japanese comedians Kazlaser and Natsu Ando of Maple Chogoukin attend the cherry blossom viewing party at the Shinjuku Gyoen National Garden in Tokyo, Japan on April 13, 2019.

(L-R) Mitz Mangrove, IKKO, Karina Maruyama, actress Natalie Emmons, Kanon Tani and actor Fuku Suzuki attend the cherry blossom viewing party at the Shinjuku Gyoen National Garden in Tokyo, Japan on April 13, 2019.

Actor Koji Ishizaka attends the cherry blossom viewing party at the Shinjuku Gyoen National Garden in Tokyo, Japan on April 13, 2019.

Japanese comedians Eiji Kotoge and Mizuki Nishimura of Viking attend the cherry blossom viewing party at the Shinjuku Gyoen National Garden in Tokyo, Japan on April 13, 2019.

Rakugo storyteller Bunchin Katsura and comedian Boo Takagi attend the cherry blossom viewing party at the Shinjuku Gyoen National Garden in Tokyo, Japan on April 13, 2019.

IKKO and actress Natalie Emmons attend the cherry blossom viewing party at the Shinjuku Gyoen National Garden in Tokyo, Japan on April 13, 2019.

Japanese comedians Pe and Pako Hayashiya attend the cherry blossom viewing party at the Shinjuku Gyoen National Garden in Tokyo, Japan on April 13, 2019.

Japan's Prime Minister Shinzo Abe poses with guests during a cherry blossom viewing party at the Shinjuku Gyoen National Garden in Tokyo, Japan on April 13, 2019.

Japan's Prime Minister Shinzo Abe attends the cherry blossom viewing party at the Shinjuku Gyoen National Garden in Tokyo, Japan on April 13, 2019.

April 13, 2019, Tokyo, Japan - Japanese Prime Minister Shinzo Abe (2nd L) accompanied by his wife Akie (R) smiles with entertainers as they pose for photo at a cherry blossom viewing party hosted by Abe at the Shinjuku Gyoen national garden in Tokyo on Saturday, April 13, 2019. Some 18,000 guests including 200 entdrtainers enjoyed an annual garden party to see fully bloomed cherry blossoms. (Photo by Yoshio Tsunoda/AFLO)

April 13, 2019, Tokyo, Japan - Japanese Prime Minister Shinzo Abe (C) smiles with entertainers as they pose for photo at a cherry blossom viewing party hosted by Abe at the Shinjuku Gyoen national garden in Tokyo on Saturday, April 13, 2019. Some 18,000 guests including 200 entdrtainers enjoyed an annual garden party to see fully bloomed cherry blossoms. (Photo by Yoshio Tsunoda/AFLO)

April 13, 2019, Tokyo, Japan - Japanese Prime Minister Shinzo Abe (C, L) accompanied by his wife Akie (C, R) smiles with entertainers as they pose for photo at a cherry blossom viewing party hosted by Abe at the Shinjuku Gyoen national garden in Tokyo on Saturday, April 13, 2019. Some 18,000 guests including 200 entdrtainers enjoyed an annual garden party to see fully bloomed cherry blossoms. (Photo by Yoshio Tsunoda/AFLO)

April 13, 2019, Tokyo, Japan - Akie Abe (C), wife of Japanese Prime Minister Shinzo Abe smiles with entertainers as they pose for photo at a cherry blossom viewing party hosted by Abe at the Shinjuku Gyoen national garden in Tokyo on Saturday, April 13, 2019. Some 18,000 guests including 200 entdrtainers enjoyed an annual garden party to see fully bloomed cherry blossoms. (Photo by Yoshio Tsunoda/AFLO)

April 13, 2019, Tokyo, Japan - Japanese Prime Minister Shinzo Abe (C) accompanied by his wife Akie (2nd R) smiles with entertainers as they pose for photo at a cherry blossom viewing party hosted by Abe at the Shinjuku Gyoen national garden in Tokyo on Saturday, April 13, 2019. Some 18,000 guests including 200 entdrtainers enjoyed an annual garden party to see fully bloomed cherry blossoms. (Photo by Yoshio Tsunoda/AFLO)

April 13, 2019, Tokyo, Japan - Japanese Prime Minister Shinzo Abe (C) surrounded by plaincloth police officers runs as he rushes to greet guests at a cherry blossom viewing party hosted by Abe at the Shinjuku Gyoen national garden in Tokyo on Saturday, April 13, 2019. Some 18,000 guests including 200 entdrtainers enjoyed an annual garden party to see fully bloomed cherry blossoms. (Photo by Yoshio Tsunoda/AFLO)

April 13, 2019, Tokyo, Japan - Japanese Prime Minister Shinzo Abe (C) surrounded by plaincloth police officers runs as he rushes to greet guests at a cherry blossom viewing party hosted by Abe at the Shinjuku Gyoen national garden in Tokyo on Saturday, April 13, 2019. Some 18,000 guests including 200 entdrtainers enjoyed an annual garden party to see fully bloomed cherry blossoms. (Photo by Yoshio Tsunoda/AFLO)

April 13, 2019, Tokyo, Japan - Japanese Prime Minister Shinzo Abe (C) surrounded by plaincloth police officers runs as he rushes to greet guests at a cherry blossom viewing party hosted by Abe at the Shinjuku Gyoen national garden in Tokyo on Saturday, April 13, 2019. Some 18,000 guests including 200 entdrtainers enjoyed an annual garden party to see fully bloomed cherry blossoms. (Photo by Yoshio Tsunoda/AFLO)

April 13, 2019, Tokyo, Japan - Japanese Prime Minister Shinzo Abe (C) surrounded by plaincloth police officers runs as he rushes to greet guests at a cherry blossom viewing party hosted by Abe at the Shinjuku Gyoen national garden in Tokyo on Saturday, April 13, 2019. Some 18,000 guests including 200 entdrtainers enjoyed an annual garden party to see fully bloomed cherry blossoms. (Photo by Yoshio Tsunoda/AFLO)

April 13, 2019, Tokyo, Japan - Japanese Prime Minister Shinzo Abe (C, L) accompanied by his wife Akie (C, R) smiles with entertainers as they pose for photo at a cherry blossom viewing party hosted by Abe at the Shinjuku Gyoen national garden in Tokyo on Saturday, April 13, 2019. Some 18,000 guests including 200 entdrtainers enjoyed an annual garden party to see fully bloomed cherry blossoms. (Photo by Yoshio Tsunoda/AFLO)

Japan's Prime Minister Shinzo Abe greets guests during a cherry blossom viewing party at the Shinjuku Gyoen National Garden in Tokyo, Japan on April 13, 2019.

Japan's Prime Minister Shinzo Abe attends the cherry blossom viewing party at the Shinjuku Gyoen National Garden in Tokyo, Japan on April 13, 2019.

Japan's Prime Minister Shinzo Abe attends the cherry blossom viewing party at the Shinjuku Gyoen National Garden in Tokyo, Japan on April 13, 2019.

Japanese comedian Torata Nanbu attends the cherry blossom viewing party at the Shinjuku Gyoen National Garden in Tokyo, Japan on April 13, 2019.

Akie Abe attends the cherry blossom viewing party at the Shinjuku Gyoen National Garden in Tokyo, Japan on April 13, 2019.