| Zen-chan Tsū-chan | — | Nippon Television | — |
| Zenderman | February 3, 1979 | Fuji Television | 52 |
| Zenki | January 9, 1995 | TV Tokyo | 51 |
| Zenmai Zamurai | April 3, 2006 | NHK Educational TV | 215 |
| Zenryoku Usagi | January 5, 2008 | Television Kanagawa | 52 |
| Zenshu | January 5, 2025 | AT-X, TV Tokyo, TX Network | 12 |
| Zero Duel Masters | April 9, 2007 | — | 12 |
| Zero Rise | — | — | — |
| Zero Tester | October 1, 1973 | Kansai Telecasting Corporation | 66 |
| Zetman | April 2, 2012 | — | 13 |
| Zillion | April 12, 1987 | — | — |
| Zipang | October 7, 2004 | — | 26 |
| Zo Zo Zo Zombie-kun | April 16, 2020 | — | 102 |
| Zoids | 1980 | — | — |
| Zoids Wild | July 7, 2018 | — | — |
| Zoids: Chaotic Century | September 4, 1999 | — | 67 |
| Zoids: Fuzors | October 3, 2004 | — | 26 |
| Zoids: Genesis | April 10, 2005 | TV Tokyo | 50 |
| Zoids: New Century | January 6, 2001 | — | 26 |
| Zom 100: Bucket List of the Dead | July 9, 2023 | — | 12 |
| Zombie Land Saga | October 4, 2018 | AT-X | 12 |
| Zombie-Loan | July 3, 2007 | TV Asahi | 13 |
| Zukkoke Knight - Don De La Mancha | April 15, 1980 | — | 23 |
| Übel Blatt | January 11, 2025 | — | 12 |
| ĒlDLIVE | January 8, 2017 | — | 12 |
| Ōban Star-Racers | April 12, 2006 | France 3 | 26 |
| Ōgon Bat | April 1, 1967 | — | 52 |
| Ōkami Kakushi | January 7, 2010 | TBS Television | 12 |
| Ōya-san to Boku | March 2, 2020 | NHK General TV | 15 |