Question: The museum owning the most collective number of Japanese cultural sites in the table was opened in what year ?

text: List of Cultural Properties of Japan - paintings (Akita)
Prefectural Cultural Properties
As of 24 May 2019 , thirty properties have been designated at a prefectural level . [ 4 ] [ 12 ]
This list is of the Cultural Properties of Japan designated in the category of paintings (絵画, kaiga) for the Prefecture of Akita.
Property Date Municipality Ownership Comments
Child Monju 稚児文珠像 chigo Monju zō C17 Nikaho Kanman-ji ( 蚶満寺 ) ) holding a nyoi ( scepter ) ; by Kanō Tan'yū
Fugen Bosatsu 普賢菩薩像 Fugen Bosatsu zō C17 Daisen private by Kanō Tan'yū ; thought , alongside his Child Monju at Kanman-ji in Nikaho , to have been part of a group of three paintings - the whereabouts of the central image of Shaka Nyorai is currently unknown
Portrait of Hakuun 白雲上人 画像 Hakuun shōnin gazō  Misato Hongaku-ji ( 本覚寺 )
Sixteen Arhats 十六羅漢像 jūroku rakan zō Edo period Akita Tentoku-ji ( 天徳寺 ) sixteen scrolls
Customs of Akita , colour on paper , emaki 紙本着色秋田風俗絵巻 shihon chakushoku Akita fuzoku emaki  Akita Akita Prefecture ( kept at the Akita Prefectural Museum )
Senju Kannon , colour on silk 絹本着色千手観音像 kenpon chakushoku Senju Kannon zō  Nikaho private
Mandala of the Two Realms 金剛胎蔵両界曼荼羅 Kongō-Taizō Ryōkai mandara end of the Kamakura period Oga Chōraku-ji ( 長楽寺 ) two scrolls , colour on silk
Chinese Peony in a Flower Basket , colour on silk , by Odano Naotake 絹本着色芍薬花籠図 直武 筆 kenpon chakushoku shakuyaku hana kago zu Naotake hitsu 1770s Yokote Akita Prefecture ( kept at the Akita Museum of Modern Art ) Akita ranga
Kisakata , colour on paper , byōbu 紙本着色 象潟 図屏風 shihon chakushoku Kisakata zu byōbu Edo period Nikaho Nikaho City ( kept at the Nikaho City Kisakata Historical Museum ( にかほ市象潟郷土資料館 ) ) the pair of six-panel folding-screens by Nagamasa Eishō ( 牧野永昌 ) ( 1747-1824 ) depict Kisakata ( 象潟 ) before the great 1804 earthquake that transformed the landscape ; Matsuo Bashō visited in 1689 and celebrated Kisakata in Oku no Hosomichi ; the area has been designated a Natural Monument
True Views and Colouring , colour on paper , by Hakuun 紙本着色 白雲 筆真景帖および彩絵方 shihon chakushoku Hakuun hitsu shinkeijō oyobi saekata end C18/early C19 Misato private ( kept at Hongaku-ji ( 本覚寺 ) )
Amida Raigō , on silk 絹本阿弥陀来迎図 kenpon Amida raigō zu  Ōdate private
Akita Ranga , Peonies on a Rock 秋田蘭画「岩に牡丹図」 Akita ranga iwa no botan zu Edo period Daisen private by Tashiro Tadakuni ( 田代忠国 ) ( 1757-1830 )
Hanshan and Shide , ink on paper 紙本墨画寒山拾得 shihon bokuga Kanzan Jittoku  Akita Daihi-ji ( 大悲寺 ) pair of scrolls
Sixteen Benevolent Deities , colour on silk 絹本着色 十六善神 kenpon chakushoku jūroku zenjin  Akita Daihi-ji ( 大悲寺 )
Kōbō Daishi , colour on silk 絹本着色弘法大師像 kenpon chakushoku Kōbō Daishi zō end of the Kamakura period /early Muromachi period Oga Chōraku-ji ( 長楽寺 ) holding a vajra and rosary
Sketchbook of Odano Naotake 小田野直武 筆写生帖 Odano Naotake hitsu shaseichō c.1777 Yokote Akita Prefecture ( kept at the Akita Museum of Modern Art ) ink and colour on paper
Cranes , by Shen Nanpin 鶴之図 ( 沈南蘋筆 ) tsuru no zu ( Shen Nanpin hitsu ) 1738 Yokote Akita Prefecture ( kept at the Akita Museum of Modern Art ) pair of scrolls
Shaka Triad 釈迦三尊像図 Shaka sanson zō  Akita Tōfuku-ji ( 当福寺 )
Copy of Van Royen 's Flowers and Birds , colour on paper , by Ishikawa Tairō and Ishikawa Mōkō 紙本着色ファン・ロイエン筆 花鳥図模写 石川大浪 ・孟高合筆 shihon chakushoku Fan Roien hitsu kachō zu mosha Ishikawa Tairō・Mōkō hitsu 1796 Yokote Akita Prefecture ( kept at the Akita Museum of Modern Art ) copy of W. Van Royen 's painting of 1725
Nursing Tigress , by Hirafuku Suian 平福穂庵 筆 乳虎 Hirafuku Suian hitsu nyūko 1890 Yokote Akita Prefecture ( kept at the Akita Museum of Modern Art ) ink and colour on silk