A guide at ordinary distances
Graham needs people who can answer questions as they arise. A grand account of civilisation cannot tell him which route to take, what an unfamiliar profession does or how to interpret an exchange happening directly in front of him.
Asano provides that kind of mediation. He understands the routines and arrangements Graham keeps encountering as surprises. His presence helps turn the future from a spectacle observed at a distance into a place through which the Sleeper can actually move.
At the flying stages, the need is particularly clear. Graham arrives with fascination but almost no knowledge of the infrastructure surrounding flight. The stages belong to a transport system with personnel, conventions and distinctions among machines. Asano can accompany and orient him within it.
He is not, however, identical with the professional aeronaut who teaches Graham to handle the monoplane. Guiding the Master through the experience and possessing the specialised skill to operate the aircraft are different roles. The future contains divisions of knowledge that cannot be collapsed into one convenient companion.
Knowledge comes with a viewpoint
Asano's explanations are useful without being neutral. He has a place within the society he describes and assumptions about what counts as reasonable or inevitable. Later, when Graham asks to see ordinary urban life, those assumptions become increasingly important.
An attendant may explain a practice in terms of efficiency or custom where Graham sees a moral problem. Familiarity can make an arrangement easy to describe and difficult to question. The difference is not simply between an ignorant visitor and an all-knowing local. It is between people whose positions teach them to notice different things.
This makes Asano a necessary but imperfect guide. Graham cannot dispense with practical help. He also cannot treat the provision of that help as a guarantee that every explanation exhausts the subject.
The relationship gives the reader a way into the future's everyday workings. Questions can be asked within journeys rather than delivered as a detached survey. The society becomes legible through the contrast between what surprises Graham and what barely requires explanation for his companion.
Reading the record
Asano should not be turned into a generic warrior, a technological ornament or an uncomplicated emblem of loyalty. His nationality is part of Wells's multinational future, not a reason to supply weapons, costume or personality unrelated to his role in the novel.
What he contributes is proximity: the knowledge needed to move through a world whose systems have become ordinary to those born within it. He makes practical discovery possible while also showing that guidance can carry the values of the order providing it.
This is especially important in a story where Graham's access to information has repeatedly been managed. The answer is not that he should trust nobody. He must learn to use another person's knowledge without surrendering his responsibility to judge what it reveals.
Asano's record therefore belongs beside the monoplane but reaches beyond it. The first part of the journey offers wonder, pleasure and a new skill. The later journey will enter spaces where the same civilisation looks far less admirable. A good guide can help someone find the way. Whether the destination should be accepted as just is a question Graham will have to answer for himself.