The Top 40 J-POP songs - Week 15 of 2026 – Only Hits Japan Charts

King Gnu's "AIZO" Takes the Crown, ending its four-week climb to #1. It overtakes last week's chart-topper, **Ado's "AiAiA," which slips to #4**. The top five sees steady upward movement, with XG's "HYPNOTIZE" at #2 and Kenshi Yonezu's "IRIS OUT" at #3. natori's "セレナーデ" holds firm at #5.

The week's biggest jump belongs to **乃紫's "メガネを外して," soaring eight spots to #16**. Notable upward moves include Ado's "Vivarium" to #6 and **東京真中の "ブレインロット" into the Top 15 at #12**. Conversely, the most significant drop is **ヨルシカ's "千鳥," which falls eleven places to #23**.

This week welcomes five new entries. The highest debut is Hitsujibungaku's "Dogs" at #10, joined by ZUTOMAYO's "ultra soul" (#14), ZUTOMAYO's "Almost Human" (#25), BE:FIRST's "BE:FIRST ALL DAY" (#28), and the collaborative anime theme **"かすかなはな" by Tatsuya Kitani & BABYMETAL at #31**. We also see three re-entries, led by amala's "Baumkuchen_EndCredits" at #13. Notable chart consistency is shown by **Eve's "Underdog," which climbs three spots to #36** after 18 weeks on the chart. Several established hits, including Ado's "Odoru Ponpokorin" (#27) and YOASOBI's "BABY" (#35), continue their gradual descent as fresh tracks enter the fray.