A few facts in case some people didn’t know:

• A bit more than 20% of South Koreans have the surname “Kim”.
• In Korea, the family name goes at the start (“Kim”), while the given name comes next (“Min-jae”).
• Official Revised Romanization of Korean states that a hyphen should be used for separating different syllables (in this case “Min-jae”). Min-jae is one name that consists of two syllables (“민재”), so “-jae” should be written in lowercase, because it’s the second syllable of his first name.
• Kim Min-jae would rather be called “Min-jae” (perhaps because it’s less common than “Kim”), but he doesn’t mind if the fans chant “Kim!” in the stadium.