Bake-kujira, as a skeletal whale appearing on rainy nights, is an unnervingly quiet entity even among sea apparitions. Many sea yokai sink ships, pull people into the ocean, and bewilder fishermen with voices and fire. Bake-kujira, however, first appears merely as a white shadow. Fishermen think it is prey, launch their boats, and throw their harpoons. But the harpoons do not harm the skeletal body; the whale is there as something devoid of physical flesh. This moment of "being unable to catch what should be catchable" creates the terror of Bake-kujira.

The skeletal form is also the form of the whale after it has already been completely consumed by humans. The meat is consumed, the fat is used, and only the bones remain as memory. Bake-kujira looks as if those bones have returned to the sea. Therefore, this yokai is not a mere massive creature, but bears the coastal livelihood and the memories of taking life. The image of the skeletal whale appearing accompanied by fish and birds^[1] shows that the whale is tied to the very abundance of the sea. The arrival of a whale was also the arrival of schooling fish, the arrival of food, and sometimes, the arrival of a god.

Placing Bake-kujira in the seas of Oki and Izumo also clarifies its meaning on the map. The issue here is not simply whether it is a "yokai of Shimane Prefecture." It is the small boat heading out to sea, the sea surface with poor visibility in the rain, the eyes of the fishermen viewing the whale as prey, and the moment those eyes are suddenly betrayed. Oki Province is a sea of islands, and Izumo Province holds the beaches and fishing grounds of the Honshu side. Bake-kujira, as a skeletal shadow drifting between them, gives shape to the awe of things coming from across the sea.

Shigeru Mizuki's visual imagery deeply engraved this yokai into modern readers. Because there are reference points like "Illustrated Encyclopedia of Japanese Yokai"^[2] and "Shigeru Mizuki's World Encyclopedia of Phantom Beasts"^[3], Bake-kujira transformed from a "sea monster that might have appeared only once" into a skeletal whale whose form anyone can imagine. Here we can see the process by which yokai increase their power not just through old records, but by being shared as pictures.

When placed alongside Funayurei and Umibozu, the differences of Bake-kujira stand out. Funayurei are human dead, and Umibozu is a massive shadow rising on the sea surface. Bake-kujira is neither human nor shadow; it is the spirit of a massive animal that once lived and was once caught. That is exactly why memorial services suit it better than extermination, and awe suits it better than capture. When the hand throwing the harpoon cuts through the empty air, humans rotate for the first time from being the side catching the whale to the side being watched by the whale.

Furthermore, Bake-kujira is a yokai possessing the power of the material "bone." While bone is evidence of death, it remains longer than flesh and supports the memories of the land and the seaside. Whale bones are massive and can become both tools and objects of prayer within a village. The image of a skeletal whale moving across the sea shows that what has died does not vanish completely, but continues to remain within the community's life. It can be said that the fishermen who saw Bake-kujira did not see a terrifying monster, but collided with their own marine history itself.

Therefore, the charm of Bake-kujira lies not in the flashiness of its attacks, but in the weight of its silence. The massive skeletal body splitting the sea surface, the emptiness of the harpoons slipping through, the fish and birds filling the surroundings, and the otherworldly realm that suddenly vanishes. All of these simultaneously evoke the sensation of eating whales as a blessing and fearing whales as spirits. Bake-kujira is a massive question floating in the seas of the San'in region.

This reading is important to avoid pushing Bake-kujira too close to "unidentified mysterious animals (UMA)" or mere giant monsters. Certainly, the form of a massive skeletal whale fits well with modern kaiju imagination. However, at the center of the folklore is not the surprise of seeing a rare creature, but the sensation of people living by the sea being stared back at by the whale that was supposed to be their prey. Bake-kujira is an animal, a spirit, and a memory seeking memorialization. Because of that overlapping, the white skeletal form is hard to forget once seen.

If arranged in an encyclopedia, it is natural to place Bake-kujira in the position of "animal spirit" among sea monsters. By reading it in distinction from the formless awe of Umibozu, the predatory monstrous fish like Isonade, and the human ghosts like Funayurei, the outline of this skeletal whale becomes rather clear.