Japan's animation television rankings for May 18-24 reveal the enduring strength of long-running classics over newer series. Sazae-san maintained its dominance with a 6.9% household rating on Fuji TV, followed by Detective Conan at 6.2% on NTV and Chibi Maruko-chan at 4.7% on Fuji TV.

The top three positions underscore how established family-friendly programming continues to command the largest audiences in Japan's animation landscape. These shows have been fixtures of Japanese television for decades, reflecting their deep cultural resonance.

Among more recent releases, One Piece held steady in the mid-range at 2.7%, while That Time I Got Reincarnated as a Slime season 3 scored 2.6% before dropping out of the rankings the following week. Similarly, Ascendance of a Bookworm Part 3: Adopted Daughter of an Archduke—which aired on April 23—registered 2.5% and also exited the top 10 by the next week's cycle.

Snowball Earth, another recent addition, similarly failed to maintain its position in the rankings week-to-week. This churn among newer series contrasts sharply with the consistency of established titles.

Other notable performers included Doraemon at 2.5%, Crayon Shin-chan at 2.3%, and a Demon Slayer: Kimetsu no Yaiba rebroadcast at 2.3%. Star Detective Precure! rounded out the top 10 at 2.0%.

These ratings reflect viewership in Japan's Kanto region only and measure live broadcasts, excluding recordings watched at later times—an important caveat in an era of streaming and time-shifted viewing. The data underscores a split in Japanese animation viewership: traditional broadcast television continues to favor multi-generational content with established fan bases, while newer series often find their primary audiences through streaming platforms rather than traditional ratings metrics.