Who did the male protagonist in Five Centimeters Per Second send 1,000 text messages to?

No, he didn’t send text messages to anyone else. It’s just that he didn’t know the phone number of the girl before he transferred to another school, so none of the text messages he wrote were sent out. He liked to write some sad sentences. To express his feelings, he wanted to tell the original girl, but he didn’t know where to send it~ The language was not organized well, it was funny, hehe!