The Japanese use the same kanji for love as the Chinese. I know that "ai shiteru" or "愛してる" is "I love you" in Japanese. And "wo ai ni" or "我爱你" is the Chinese (Mandarin) way of saying "I love you".
I used to study Japanese because my grandma worked with exchange students so I always grew up with someone Japanese in my household. I love the Japanese culture but don't know if I want to start studying it again or learn Mandarin. BAH!!