Japan's Prime Minister Shinzo Abe, who is also leader of the ruling Liberal Democratic Party (LDP), looks on as he puts a rosette on the name of a candidate who is expected to win the upper house election, at the LDP headquarters in Tokyo, Japan, July 21, 2019. REUTERS/Kim Kyung-Hoon

TOKYO (Reuters) - Japanese Prime Minister Shinzo Abe said his ruling coalition’s solid win in an upper house election on Sunday showed that voters supported debate over his proposal to revise the post-war, pacifist constitution.

Abe, speaking to a TV broadcaster after exit polls showed his coalition would win a solid majority, also said a scheduled rise in the sales tax to 10% from 8% in October was necessary for the social security system and to gain international trust.