Daftar singel nomor satu Oricon tahun 1968
Tangga lagu Singel Oricon Mingguan

| Terbit | Singel | Artis | Ref>  |
| --- | --- | --- | --- |
| 4 January 4 | "Love You Tokyo [ja]" | Los Primos [ja] |  |
| 11 Januari | "Love You Tokyo [ja]" | Los Primos [ja] |  |
| 18 Januari | "Love You Tokyo [ja]" | Los Primos [ja] |  |
| 25 Januari | "Kaette Kita Yopparai [ja]" | The Folk Crusaders |  |
| 1 Februari | "Kaette Kita Yopparai [ja]" | The Folk Crusaders |  |
| 8 Februari | "Kaette Kita Yopparai [ja]" | The Folk Crusaders |  |
| 15 Februari | "Kaette Kita Yopparai [ja]" | The Folk Crusaders |  |
| 22Februari | "Kaette Kita Yopparai [ja]" | The Folk Crusaders |  |
| 26 Februari | "Koi no Shizuku [ja]" | Yukari Itō [ja] |  |
| 5 Maret | "Koi no Shizuku [ja]" | Yukari Itō [ja] |  |
| 11 Maret | "Koi no Shizuku [ja]" | Yukari Itō [ja] |  |
| 18 Maret | "Koi no Shizuku [ja]" | Yukari Itō [ja] |  |
| 25 Maret | "Yūbe no Himitsu [ja]" | Tomoko Ogawa [ja] |  |
| 1 April | "Massachusetts"   (マサチューセッツcode: ja is deprecated ) | Bee Gees |  |
| 8 April | "Koi no Shizuku" | Yukari Itō |  |
| 15 April | "Hana no Kubikazari / Ginga no Romance [ja]" | The Tigers |  |
| 22 April | "Hana no Kubikazari / Ginga no Romance [ja]" | The Tigers |  |
| 29 April | "Hana no Kubikazari / Ginga no Romance [ja]" | The Tigers |  |
| 6 Mei | "Hana no Kubikazari / Ginga no Romance [ja]" | The Tigers |  |
| 13 Mei | "Hana no Kubikazari / Ginga no Romance [ja]" | The Tigers |  |
| 20 Mei | "Hana no Kubikazari / Ginga no Romance [ja]" | The Tigers |  |
| 27 May | "Hana no Kubikazari / Ginga no Romance [ja]" | The Tigers |  |
| 3 Juni | "Hoshikage no Waltz [ja]" | Masao Sen [ja] |  |
| 10 Juni | "Hoshikage no Waltz [ja]" | Masao Sen [ja] |  |
| 17 Juni | "Hoshikage no Waltz [ja]" | Masao Sen [ja] |  |
| 24 Juni | "Hoshikage no Waltz [ja]" | Masao Sen [ja] |  |
| 1 Juli | "Hoshikage no Waltz [ja]" | Masao Sen [ja] |  |
| 8 Juli | "Emerald no Densetsu [ja]" | The Tempters |  |
| 15 Juli | "Emerald no Densetsu [ja]" | The Tempters |  |
| 22 Juli | "C C C [ja]" | The Tigers |  |
| 29 Juli | "C C C [ja]" | The Tigers |  |
| 5 Agustus | "C C C [ja]" | The Tigers |  |
| 12 Agustus | "C C C [ja]" | The Tigers |  |
| 19 Agustus | "Hoshikage no Waltz" | Masao Sen |  |
| 26 Agustus | "C C C" | The Tigers |  |
| 2 September | "C C C" | The Tigers |  |
| 9 September | "The Sound of Silence"   (サウンド・オブ・サイレンスcode: ja is deprecated ) | Simon & Garfunkel |  |
| 16 September | "The Sound of Silence"   (サウンド・オブ・サイレンスcode: ja is deprecated ) | Simon & Garfunkel |  |
| 23 September | "Koi no Kisetsu [ja]" | Pinky & Killers [ja] |  |
| 30 September | "Koi no Kisetsu [ja]" | Pinky & Killers [ja] |  |
| 7 Oktober | "Koi no Kisetsu [ja]" | Pinky & Killers [ja] |  |
| 14 Oktober | "Koi no Kisetsu [ja]" | Pinky & Killers [ja] |  |
| 21 Oktober | "Koi no Kisetsu [ja]" | Pinky & Killers [ja] |  |
| 28 Oktober | "Koi no Kisetsu [ja]" | Pinky & Killers [ja] |  |
| 4 November | "Koi no Kisetsu [ja]" | Pinky & Killers [ja] |  |
| 11 November | "Koi no Kisetsu [ja]" | Pinky & Killers [ja] |  |
| 18 November | "Koi no Kisetsu [ja]" | Pinky & Killers [ja] |  |
| 25 November | "Koi no Kisetsu [ja]" | Pinky & Killers [ja] |  |
| 2 Desember | "Koi no Kisetsu [ja]" | Pinky & Killers [ja] |  |
| 9 Desember | "Koi no Kisetsu [ja]" | Pinky & Killers [ja] |  |
| 16 Desember | "Ima wa Shiawasekai" | Mitsuo Sagawa [ja] |  |
| 23 Desember | "Koi no Kisetsu" | Pinky & Killers |  |
| 30 Desember | "Koi no Kisetsu" | Pinky & Killers |  |