Ключевые слова: bird, blue sky, boat, bright, building, castle, city, cityscape, copy space, day, early spring, empty, fortress, green, historic sites, history, japan, landscape, moat, natural, osaka, osaka castle, park, ruins, ruins of a castle, sky, spring, stone wall, tour boat, tourism, town, travel, tree, view, wall, water, waterfowl, wild bird, winter,