If you want to find a Japanese pop song, here are some suggestions that may be suitable for you:

1. "journey to the south"-Jay Chou

This song tells the story of a Chinese man wandering in Japan, and the melody and music elements in the style are all mixed with some Japanese music factors, such as the flute sound and the performance of the traditional Japanese musical instrument "Sanwei Line".

2. Hear the Sound of Rain-Jason

This song is an affectionate love song, and its style combines the elements of China traditional music and japanese pop, especially the slow rhythm, soft melody and voice, which makes this song have a strong Japanese sentiment.

3. The First Class in the World-Leslie Cheung

This song describes the feeling of a person in a foreign land. Melodious and feminine, combined with guitar and Chinese musical instruments, it gives people a soft and warm feeling, and also reflects the slow rhythm and affectionate feelings emphasized by Japanese music.

4. "Once in a Thousand Years"-Eason Chan

This song is regarded as a classic in Japanese pop music, and its genre can be said to be a model of the integration of musical elements between China and China. The song adopts the melody of the Japanese folk song "Thousand Sakura", and combines the musical instruments and musical elements of China, which is affectionate and feminine.

I hope the above songs can meet your needs and bring you a wonderful listening experience.