Sunday Morning Tokusatsu Fever: '#Nitiasa' Dominates Social Media with Game-Changing Twists

On the morning of the 18th, the hashtag “#nitiasa”—which refers to Japan’s flagship Sunday morning superhero and anime programming block—skyrocketed up the trending charts on X (formerly Twitter) as viewers flooded the platform with passionate live commentary and in-depth fan theories. Both Kamen Rider Myce and Kakusei Hunter Omega Horn reached major turning points this week, sparking intense discussion online over their high-stakes drama and standout character performances.

In Kamen Rider Myce, the psychological duel over the pivotal “Ex” items escalated between protagonist Osumi and the “Zodiac Alliance,” an organization themed around the twelve signs of the Chinese zodiac. Viewers were captivated by the gripping yet humorous banter between allies and adversaries, as well as an exhilarating hand-to-hand fight sequence showcasing Osumi’s sharp intellect. Meanwhile, fan discourse ignited over the breakout new character Muton—whose relentless combat choreography and subtle changes in transformation poses based on emotional state drew praise—alongside feverish speculation regarding the true identity of the enigmatic Amataka.

Simultaneously, Kakusei Hunter Omega Horn delivered a complex, gritty ensemble drama, highlighted by a clandestine pact between the bandit leader Ibar and Reiji. A desperate line spoken by Agi—“There’s no Galactic Federation Police, so law and order is completely ruined!”—triggered a flurry of amused and empathetic reactions across social media. The intense physical stunts delivered by Kohei Nagata as Reiji, paired with preview footage teasing a fateful reunion and renewed transformation in the upcoming episode, pushed fan anticipation to a fever pitch.

To top it all off, the immediate post-broadcast reveal of the latest “Mini-pla” model kit lineup left enthusiasts happily overwhelmed, with many exclaiming that they were “drowning in a flood of content.” As both series charge toward the heart of their respective narratives, Sunday mornings continue to be unmissable television for tokusatsu fans.

The Context

In Japan, “Nitiasa” (short for Nichiyō Asa, or “Sunday Morning”) is a beloved pop-culture institution. For decades, TV Asahi and Toei have dedicated the Sunday 8:30 a.m. to 10:00 a.m. time slot to premier live-action superhero (tokusatsu) franchises like Kamen Rider and Super Sentai, alongside magical girl anime such as Pretty Cure. This programming block commands a dedicated multi-generational fanbase, ranging from young children to adult hobbyists. Each week, tens of thousands of fans tune in live and take to social media using the hashtag “#nitiasa” to dissect episode lore, react to viral lines, and follow commercial tie-ins such as Bandai’s “Mini-pla” (mini plastic model) candy toys.

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