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170,000-Year-Old Cicada Adult (17万年ゼミ成虫, Jūnana Man-nen Zemi Seichū; Viz: 170,000-Year-Old Cicada Imago) was a large Mysterious Being that attacked Z-City at some point during Saitama's training years. It was presumably killed by Saitama.[2]


The Cicada Adult was an extremely massive cicada-like creature, easily able to cast a large shadow over a city. Located at the center of its head was a humanoid face.

Appearances in Other Media[]



170,000-Year-Old Cicada Adult in front of Saitama

170,000-Year-Old Cicada Adult attacks Z-City damaging many buildings. Saitama then appears before it and declares with a smile that summer has arrived.

Abilities and Powers[]

Since it was the grown-up version of the 170,000-Year-Old Cicada Larva, it was presumably much more powerful. Even S-Class heroes might have had difficulty dealing against it due to its resistant shell and its ability to fly.[1]

Physical Abilities[]

Enhanced Strength: Due to its enormous size, 170,000-Year-Old Cicada Adult possessed great strength. Even 170,000-Year-Old Cicada Larva, a smaller and weaker version of it, had enough strength to defeat two A-Class heroes and easily smash through buildings.

Enhanced Durability: 170,000-Year-Old Cicada Adult possessed a resistant shell.[1] Even 170,000-Year-Old Cicada Larva, a smaller and weaker version of it, was durable enough to easily smash through buildings without visible damage.

Flight: The Cicada Adult's wings allowed it to fly.


  1. 1.0 1.1 1.2 1.3 1.4 One-Punch Man Encyclopedia; One-Punch Man: Hero Encyclopedia, page 183
  2. Summer


Mysterious Beings
Dragon (or higher) Boros Orochi *
Demon 170,000-Year-Old Cicada Larva 170,000-Year-Old Cicada Adult Armored GorillaAwakened Cockroach Baquma Beast King Bruinado Bug God Building Booper Deep Sea King Demonic Fan Devil Long Hair *Do-S *Eyesight Face Ripper Fist Fight Djinn Free Hugger G4 G5 Game-Berus Giant Crow Grizzly Nyah Hundred-Eyes Octopus Jumping Spider Macho Daikon Mosquito Girl Rafflesidon Rhino Wrestler Royal Ripper Scaledon Senior Centipede Showerhead Sky King Subterranean King Super Mouse Surprise-Attack Plum The Great Food Tub The Three Crows Unihorn Vampire (Pureblood) 
Wolf Himawari Hotdog Messenger of the Seafolk Piggy Bancon Tongue Stretcher
Less than Wolf
Unknown Alien Seer *Ancient King Angry Grandpa Autumn Phantom Red Golden-ringed Dragonfly *Benpatsu *Choze DarkDark Matter Gunner Eagle Enamel Evil Eggs Evil Eye Evil Natural Water *Falcon Fish of DarknessGale Giant Salamander Gigakigan Goddess Glasses Gyoffrey Hamukichi *Haragiri Hawk Hellfire Junior Centipede Kite Lord Great White ManakoMen's Esthetician Man *Platinum Sperm Rosie Raptora *RepteraSage Centipede Suppon Sword Devil Executioner Venus Mantrap Volten *