SKE48's "Igai Ni Mango" debuts at No. 1 on the latest Billboard Japan Hot 100 chart (dated July 17 to 23) after selling 368,313 copies in its first week and coming in at No. 1 for physical sales.

The wide margin they gained in this index combined with others including No. 2 for Twitter mentions, No. 6 for look-ups, No. 49 for downloads and No. 68 for radio airplay lands the Nagoya-based girl group's 21st single atop this week's Japan Hot 100.

Nana Mizuki's "TESTAMENT" and "Destiny's Prelude" come in at No. 2 and No. 3, respectively. The singles were released simultaneously and sold approximately 30,000 copies each. "TESTAMENT" comes in at No. 5 in downloads and "Destiny's Prelude" at No. 11, a difference likely to affect the songs' positions next week.

Looking at this week's downloads, Egoist's "Eiyuu Unmei No Uta" rises to No. 1, and Mr. Children's "Hanabi" shoots to No. 2. "Hanabi" is the ending theme song for the popular TV drama series Code Blue and the third season premiere boosted streaming (No. 9) as well, restoring a song that was originally released 10 years ago to the No. 9 spot on the Japan Hot 100.

"Rain" by Sekai no Owari (known as End of the World in the U.S.) stays at No. 3 in downloads, and Kana Nishino's "Girls" debuts at No. 4. Keisuke Kuwata's single "Wakai Hiroba" comes in at No. 7 for downloads and No. 6 for radio airplay thanks to the vigorous promotion of his new album, placing the iconic pop artist at No. 17 on this week's Japan Hot 100.

Kenshi Yonezu, who topped the Japan Hot 100 with "Peace Sign" earlier this month, hits No. 1 in Twitter this week for "Suna No Wakusei feat. Hatsune Miku" released under the name Hachi. This song, included in Hatsune Miku: Magical Mirai 2017 official album, will be released Aug. 2, and the buzz surrounding the music video released in advance accelerated Twitter mentions. The song's rise has resulted in the uptick of a hit from 2014, "Eine Kleine," to No. 3 in Twitter as well, and Yonezu currently has four songs charting in the Japan Hot 100 with Hachi debuting at No. 8 this week.

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 provided by Gfk Japan, as well as streaming counts based on lyrics displayed on PetitLyrics.

Billboard Japan Hot 100 Top 20 (dated July 17 to 23)

1. "Igai Ni Mango" / SKE48

2. "TESTAMENT" / Nana Mizuki

3. "Destiny's Prelude" / Nana Mizuki

4. "RAIN" / SEKAI NO OWARI

5. "Dirty Disco" / THE RAMPAGE from EXILE TRIBE

6. "TT" / TWICE

7. "Taiyou 4 Gou" / 10-FEET

8. "Suna No Wakusei feat. Miku Hatsune" / Hachi

9. "HANABI" / Mr.Children

10. "DECIDED" / UVERworld

11. "Peace Sign" / Kenshi Yonezu

12. "Eiyuu Unmei No Uta" / EGOIST

13. "Shape Of You" / Ed Sheeran

14. "Getsuyoubi No Asa Skirt Wo Kirareta" / Keyakizaka46

15. "Girls" / Kana Nishino

16. "Sora" / GENERATIONS from EXILE TRIBE

17. "Wakai Hiroba" / Keisuke Kuwata

18. "SIGNAL" / TWICE

19. "Oozora De Dakishimete" / Hikaru Utada

20. "Hajimari No Yokan" / Ketsumeishi