Chiba Shogyo navy blue short sleeve t-shirt

Navy blue short sleeve t-shirt with the words Chiba Shogyo on the front and kanji on the back. Some of the characters suggest that this could be a shirt from a high school. Google translate says the characters are "Chiba Prefectural Chiba Commercial High School." There is some wear on the characters, as depicted in the pictures. Measurements in pictures. Any questions, please comment.