Final answer:
The provided texts do not offer the necessary context to answer the question about the narrator's realization of power in 'Otsuichi' or its connection to Godzilla, as they discuss real historical events and cultural beliefs.
Step-by-step explanation:
From the excerpts provided, it is challenging to confidently answer the specific question about Otsuichi and the realization of the narrator's power, its convenience, escalation, and the potential relation to Godzilla. The texts presented discuss historical events, beliefs in power and wealth found in different cultures, and Japan's history and military expansion, which does not directly relate to the supernatural powers of a fictional narrator. If the question pertains to a literary work related to the supernatural, the passages provided do not give the necessary context to substantiate any of the options (A) The narrator realized his power in childhood (B) The power seemed inconvenient at the time (C) The use of the power was always controlled or (D) The power has no relation to Godzilla.