Question: The present observation of Greenery is a holiday that stems from the celebration of a birthday of an emperor whose name means what in English ?

full_context: Document 1: Japanese calendar: Japanese calendar types have included a range of official and unofficial systems. At present, Japan uses the Gregorian calendar together with year designations stating the year of the reign of the current Emperor.
Document 2: Lei Day: Lei Day is a statewide celebration in all of Hawaii. The celebration begins in the morning of May first every year and continues throughout the entire day and even continues onto the next day. Lei day was established as a holiday in the year of 1929 and continues to this day. Each Hawaiian island has a different type of lei that is used for the celebration and for its people to wear. The festivities have consistently grown each year and the state of Hawaii has had to move the location of the event. Lei day was first held in the Courts and Town Halls but has since been moved to Kapi'olani park where it is still being held today.
Document 3: Masahito, Prince Hitachi: Masahito, Prince Hitachi (常陸宮正仁親王 , Hitachi-no-miya Masahito Shinnō , born 28 November 1935) is a member of the Imperial House of Japan and the younger brother of current Emperor Akihito. He is the second son and sixth born child of Emperor Shōwa and Empress Kōjun and is fourth in line to the Chrysanthemum Throne. Prince Hitachi is mainly known for philanthropic activities and his research on the causes of cancer.
Document 4: Empress Michiko: Michiko (美智子 ) , born Michiko Shōda (正田美智子 , Shōda Michiko ) on 20 October 1934, is the Empress of Japan as the wife of Akihito, the current Emperor of Japan reigning from 7 January 1989. She succeeded her mother-in-law, Empress Nagako (Kōjun), consort of Emperor Hirohito (Shōwa).
Document 5: Order of the Paulownia Flowers: The Order of the Paulownia Flowers (桐花章 , Tōka shō ) is an order presented by the Japanese government. Established in 1888 during the Meiji Restoration as the highest award in the Order of the Rising Sun; however, since 2003 it has been an Order in its own right. The only grade of the order is "Grand Cordon of the Order of the Paulownia Flowers" (旭日桐花大綬章 , Kyokujitsu tōka daijushō ) , which ranks higher than the Order of the Rising Sun but lower than the Order of the Chrysanthemum.
Document 6: Fumihito, Prince Akishino: Fumihito, Prince Akishino (秋篠宮文仁親王 , Akishino-no-miya Fumihito Shinnō , born 30 November 1965) is a member of the Japanese imperial family. He is the younger son of Emperor Akihito and Empress Michiko and currently second in line to the Chrysanthemum Throne.
Document 7: Prince Nobuhiko Higashikuni: Prince Nobuhiko Higashikuni (b. 東久邇 信彦; 10 March 1945）is a Japanese aristocrat. The eldest grandson of Emperor Hirohito, he is the eldest son of Shigeko, Princess Teru (the eldest daughter of Emperor Hirohito, and eldest sister of present Emperor Akihito) and Prince Morihiro Higashikuni, a grandson of Emperor Meiji. He is nephew of reigning Emperor Akihito.
Document 8: Meiji Shrine Inner Garden: The Meiji Shrine Inner Garden (明治神宮内苑 , Meiji Jingū Naien ) or Yoyogi Gyoen is a public garden adjacent to Meiji Shrine and Yoyogi Park in Shibuya, Tokyo. The garden was once part of the suburban residences of Katō Kiyomasa and later the Ii clan during the Edo period. During the Meiji period, the garden came under the supervision of the Imperial Household Agency and named Yoyogi Gyoen (Yoyogi Imperial Garden) and was frequently visited by Emperor Meiji and Empress Shōken. The garden contains a tea house, an arbour, a fishing stand and an iris garden. It has an area of 83,000 square meters and is open to the public throughout the year.
Document 9: Hirohito: Hirohito (裕仁 , April 29, 1901 – January 7, 1989) was the 124th Emperor of Japan according to the traditional order of succession, reigning from December 25, 1926, until his death. He was succeeded by his eldest son, Akihito. In Japan, he is now referred to primarily by his posthumous name, Emperor Shōwa (昭和天皇 , Shōwa-tennō ) . The word "Shōwa" is the name of the era that corresponded with the Emperor's reign, and was made the Emperor's own name upon his death. The name Hirohito means "abundant benevolence".
Document 10: Prince Hisahito of Akishino: Prince Hisahito of Akishino (悠仁親王 , Hisahito Shinnō , born 6 September 2006) is the youngest child and only son of Fumihito, Prince Akishino and Kiko, Princess Akishino. He is the only grandson of Emperor Akihito and Empress Michiko. Hisahito is third in line to become Emperor of Japan, after his uncle Naruhito and his father.
Document 11: Japanese dissidence during the early Shōwa period: Japanese dissidence during the early Shōwa period was dissidence by Japanese citizens of the Empire of Japan (1868–1947) during the Shōwa period, the reign of the Shōwa Emperor, Hirohito (1926–1989). The early Shōwa period witnessed the rise of Japanese militarism, and Imperial Japan's full-scale invasion of China in the Second Sino-Japanese War (1937–1945), which escalated into a full-scale invasion of the Asia-Pacific during the Pacific theatre of World War II (1941–1945). Throughout the period, there was political repression in Imperial Japan.
Document 12: Japanese New Year: The Japanese New Year (正月 , Shōgatsu ) is an annual festival with its own customs. Since 1873, the official Japanese New Year has been celebrated according to the Gregorian calendar, on January 1 of each year, New Year's Day (元日 , Ganjitsu ) . However, the celebration of the traditional Japanese New Year is still marked on the same day as the contemporary Chinese, Korean, and Vietnamese New Years.
Document 13: Yasukuni Shrine: The Imperial Shrine of Yasukuni, informally known as the Yasukuni Shrine (Yasukuni Jinja ) , is a Shinto shrine located in Chiyoda, Tokyo, Japan. It was founded by Emperor Meiji in June 1869 and commemorates those who died in service of the Empire of Japan, which existed from the Meiji Restoration of 1869 until the nation was renamed during the Allied occupation in 1947. The shrine's purpose has been expanded over the years to include those who died in the wars involving Japan spanning from the entire Meiji and Taishō period, and lesser part of the Shōwa period.
Document 14: Greenery Day: The present observation of Greenery Day (みどりの日 , Midori no Hi ) as a national holiday in Japan stems from the celebration of the Emperor Shōwa's birthday on April 29 every year during the Shōwa era. In 1989, following the ascension of the current Emperor Akihito to the Chrysanthemum Throne, the name of the holiday was changed from "Birthday of the Emperor" to "Greenery Day". Officially, as its name suggests, it is a day to commune with nature and to be thankful for blessings. The day was renamed to "Greenery Day" to acknowledge the controversial wartime emperor's love for plants without directly mentioning his name. However, in practice it is seen as just another day that expands the Japanese Golden Week vacation.
Document 15: Hanako, Princess Hitachi: Hanako, Princess Hitachi (正仁親王妃華子 , Masahito Shinnōhi Hanako ) , born Hanako Tsugaru (津軽華子 , Tsugaru Hanako ) on 19 July 1940, is a member of the Japanese Imperial Family as the wife of Masahito, Prince Hitachi, who is the younger son of Emperor Shōwa and the only brother of the current emperor, Akihito.
ground_truth: abundant benevolence