Shōmyō Temple is one of those local religious buildings that rewards a quiet look rather than a rushed checklist visit. It adds texture to Yokohama: architecture, community life, and the long habit of building sacred places in the middle of ordinary neighbourhoods. It sits well outside the centre, so treat it as a deliberate side trip rather than something to squeeze between central sights.
Go respectfully, especially if a service is under way. The exterior is usually worth seeing even when the doors are closed, and if you can step inside, take a few minutes for the details: icons, side chapels, woodwork, stained glass, or the simple evidence of an active congregation.