Kyoto, the capital
洛 centers on the historical Chinese capital Luoyang and, by extension, the Japanese capital Kyoto. It is a place name that carries the idea of a grand capital city.
洛 combines 氵 (water) with 各, which likely contributes the sound. It originally referred to the Luo River in China and later became associated with the city Luoyang, and by extension Kyoto.
Water 氵 flows beside the ancient capital 各, like the river that runs through Kyoto. Picture the Kamo River in Kyoto: 洛 is the capital by the water.
For ラク, imagine a lucky traveler arriving in Kyoto: luck -> ラク, and the capital welcomes them by the river.
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the capital (esp. Kyoto)
going to Kyoto; visiting Kyoto
inside the capital
outside Kyoto or the capital
capital (esp. Kyoto)
proceeding to Kyoto; entering Kyoto
going to the capital
returning to a capital city (esp. Kyoto)
comprehensive list of famous places in Kyoto accompanied with pictures and text
exile from Kyoto (Edo-period punishment)
in and around the city of Kyoto
views in and around Kyoto (style of folding screen depicting the scenery and scenes of everyday life in Kyoto; late Muromachi period to the Edo period)
in Kyoto or the capital
north of the capital
south of the capital
lakh; 100,000 (Indian numbering system)
Luo Xue school (neo-Confucianist school)
western Kyoto
to be favorably received and sell extremely well (of a book); to raise the price of paper in Luoyang