I'm back to reporting the top anime songs, this time I'm using Billboard Japan's data:
Top 10 Anime Songs
2020/09/21 published date
^-3 (116w) 10. Kenshi Yonezu, "Peace Sign" (My Hero Academia/Boku no Hero Academia S2 OP1)
+RE (11) 9. TM NETWORK, "Get Wild" (CITY HUNTER ED)
"Get Wild", a 33-year old song, got a big boost when Nogizaka46 (female idol group created as the official rival of AKB48) sang it on the popular TV music program "THE MUSIC DAY" in a medley of Tetsuya Komuro (of TM NETWORK) songs.
^-3 (22) 8. SixTONES, "NAVIGATOR" (The Millionaire Detective - Balance: Unlimited/Fugou Keiji - Balance:Unlimited OP)
^-3 (53) 7. Official Hige Dandism, "Yesterday" (HELLO WORLD TM)
^-4 (22) 6. Yorushika, "Hana ni Bourei" (A Whisker Away/Nakitai Watashi wa Neko o Kaburu TM)
V+1 (76) 5. Aimyon, "Haru no Hi" (Crayon Shin-chan: Honeymoon Hurricane ~The Lost Hiroshi~/Shinkon Ryokou Hurricane ~Ushinawareta Hiroshi~ TM)
^-1 (61) 4. Mrs.GREEN APPLE, "Inferno" (Fire Force/En'en no Shouboutai ni no Shou S1 OP)
NEW (1) 3. Aimer, "SPARK-AGAIN" (Fire Force/En'en no Shouboutai ni no Shou S2 OP)
NEW (1) 2. BUMP OF CHICKEN, "Gravity (Love Me, Love Me Not/Omoi, Omoware, Furi, Furare TM)
<=> (73) 1. LiSA, "Gurenge" (Demon Slayer/Kimetsu no Yaiba OP)