Stray dogs in Japan

Hello, everyone! How are you? I am surprised to see snows yesterday.
Three or four weeks ago, I watched the TV program which shows the stray dogs in Bangkok, Thailand. In Bangkok, everybody loves and feeds stray dogs because officially those dogs are under protected by the government. Because their king established rules not to kill any dogs, every dog has to be taken and released by officers after had vaccine for hydrophobia. I think that is totally different from Japan. In Japan, people kill approximately 19-400,000t of captured stray dogs per year. And the way to kill them is to let them eat poisonous meatballs or put into a small room filled with monoxide. Last year, one dog died for eating up a poisonous meatball in the half way of walking with his master. Those meatballs were setted as a trap for decreasing numbers of stray dogs or cats. But is that really okay to kill stray dogs and cats without reminding humans to think about their precious lives? Setting poisons and killing tons of them are indirectly coming from pet booms in Japan. there are many dogs and cats hotels to teach tricks and promise spaces to have pets. But in my opinion, if people cannot teach any tricks and have spaces to take care of animals, they shouldn't have any pet at all then!! It is too selfish for having pets, animals' lives. There seems no responsibility for it.
I wish people will realize how to live with animals in urban cities someday.