That's what we found about meaning of emoji ➰ in the Japanese Internet. Here are some versions, go in descending order of probability.

[*] In Asian languages, the tone has a certain meaning and is indicated in the sign. Instead of the long-tone symbol at the end of the word, sometimes such a loop is put. Perhaps to show a good mood.
[*] Illustrates what is drawn on the icon, that is, something like a loop. It is often used in conjunction with other emoji: ➰❣️ , ➰🍂 , 🐔➰🐣➰🐤➰🐔.
[*] Indicates the USB connection.
[*] This is a wrapper for rice balls 🍙, that are eaten at night.