In 1630, the Sento Imperial Palace was completed for Emperor Go-Mizunoo, who had abdicated the throne. In Japan, retirement from imperial duties was not disgrace but tradition -- the institution of the Daijo Tenno, or retired emperor, carried its own authority and required a residence befitting that status. Alongside the Sento Palace, a companion structure called the Omiya Palace was built for the Empress Dowager. Both palaces were repeatedly destroyed by fire and reconstructed. When the Sento Palace burned for the last time in 1854, no one rebuilt it. The Omiya Palace, however, was reconstructed in 1867 and still serves as a residence for the emperor during visits to Kyoto. The Imperial Household Agency now administers the entire grounds, opening them to visitors who can explore the garden that two centuries of emperors retreated to when the burdens of the Chrysanthemum Throne grew heavy.

Kobori Masakazu, known by his art name Enshu, laid out the gardens in 1630, and his design survives as one of the finest examples of the Japanese strolling garden tradition. The garden's primary feature is a large pond divided into north and south segments, linked by a short canal added in 1747. The north pond was extended and reshaped between 1684 and 1688, deepening the garden's complexity. The south pond is distinguished by its expansive shore of rounded stones and cherry trees -- an artificial coastline meant to evoke the ocean. Mixed natural and hewn stones line the edges, and a separate embankment of precisely squared stones introduces geometric counterpoint to the organic forms. Six bridges cross the water in varied styles, including one bearing an impressive wisteria trellis built in 1895. Islands punctuate the surface, each composed with the deliberation of a painted landscape. Every element -- stone, water, tree, and pathway -- was placed to unfold sequentially as visitors walk the circuit.

Only two structures from the original Sento Palace complex survive, and together they frame the garden's range of aesthetic expression. Seika-tei sits at the southern end of the south pond: single-roofed, spare, and composed with a restraint that lets the surrounding garden do the speaking. Its clean lines and open aspect suggest formal refinement -- the teahouse as architectural punctuation rather than shelter. At the western edge of the north pond stands Yushin-tei, its thatched roof and rustic construction offering a deliberate contrast. A notable round window pierces one wall, a gesture borrowed from Zen aesthetics that frames the garden beyond like a living scroll painting. The pairing is intentional. Japanese garden design often works through contrasts -- formal and informal, cultivated and wild, stone and moss -- and these two teahouses embody that principle. They are the only buildings that fire spared, and they anchor the garden's two poles of sensibility.

The concept of the Sento Imperial Palace extends beyond this single Kyoto garden. The term refers not to one place but to any residence of a retired emperor. Before Emperor Akihito abdicated on April 30, 2019 -- the first Japanese emperor to do so since Emperor Kokaku in 1817 -- the designation had been dormant for two centuries. Akihito's abdication revived an ancient institution. Until he moved out of the Fukiage Palace on the grounds of the Tokyo Imperial Palace on March 31, 2020, that residence carried the Sento designation. He subsequently moved to the Takanawa Residence in Tokyo, which became the new Sento Imperial Palace. The Kyoto garden, meanwhile, endures as the most celebrated physical expression of what retirement meant for Japan's emperors: not withdrawal from beauty, but deeper immersion in it.