Keyakizaka46's new single, "Ambivalent," shoots to No. 1 on this week's Billboard Japan Hot 100 dated Aug. 13 to 19 after selling 837,390 CDs in its first week.

The J-pop girl group's seventh single swept four metrics of the chart's methodology: physical sales, downloads, look-ups, and Twitter mentions. It also came in at No. 5 for streaming, No. 13 for video views and No. 24 for airplay, leading this week's Japan song chart by a huge margin.

DA PUMP's "U.S.A." slips two notches to No. 4 but continues to rule streaming and video views for the eighth consecutive week.

Leo Ieiri's "Moshi Kimi Wo Yurusetara" jumps 16-6 on the Japan Hot 100 this week after the Japanese singer-songwriter made a number of media appearances to promote her new single, which is the theme song for Fuji TV's Zettai Reido drama series currently being aired in the celebrated Monday 9 p.m. time slot, called "getsu-ku."

Metrics-wise, the song rose 55-28 in streaming, bowed at No. 12 in look-ups, and maintained its position at No. 4 for downloads this week, boosting its performance on the Japan song chart. It's the track's highest position so far, rising from when it debuted at No. 14 on the chart (dated July 30 to Aug. 5) after the CD went on sale Aug. 1.

DAOKO and Kenshi Yonezu's long-running hit single "Uchiage Hanabi," released on Aug. 16, 2017, appears to have become a new summer staple. The former No. 1 song entitled "fireworks" in Japanese re-enters the top 10 on the Japan Hot 100 this week, being streamed (No. 2), viewed (No. 8), and downloaded (No. 10) in copious amounts as the go-to background music during Japan's record-breaking heat this summer.

The Billboard Japan Hot 100 combines physical and digital sales, radio airplay, Twitter mentions, YouTube and GYAO! video views, Gracenote look-ups and audio streams from Apple Music, AWA, Google Play Music, KKBOK, LINE MUSIC, Rakuten Music, Recochoku provided by Gfk Japan, as well as streaming counts based on lyrics displayed on PetitLyrics.

Billboard Japan Hot 100 Top 20 (dated Aug. 13 to 19)

1. Ambivalent / Keyakizaka46

2. Start Dash! / Johnny's WEST

3. Jikochu De Iko! / Nogizaka46

4. U.S.A. / DA PUMP

5. Lemon / Kenshi Yonezu

6. Moshi Kimi Wo Yurusetara / Leo Ieiri

7. Ai No Katachi feat. HIDE (GReeeeN) / MISIA

8. Marigold / Aimyon

9. Natsu Hayate / Arashi

10. Uchiage Hanabi / DAOKO x Kenshi Yonezu

11. Associate / Gaku Yaotome (CV: Wataru Hatano)

12. Kagayakidashite Hashitteku / Sambomaster

13. BDZ / TWICE

14. Sekai Wa Anata Ni Waraikaketeiru / Little Glee Monster

15. Ao To Natsu / Mrs. GREEN APPLE

16. Drama / C & K

17. Long Hope Philia / Masaki Suda

18. HANABI / Mr.Children

19. SUPER BALL / DOBERMAN INFINITY

20. I WANT YOU BACK / TWICE