Question: The man associated with the tallest bell of Japan 's Heian period is considered the founder of what ?

text: List of National Treasures of Japan (crafts: others)
Treasures -- Metalwork
The introduction of Buddhism to Japan in the mid-6th century led to the development of large hanging bronze bells without a clapper rung with a mallet or hanging beam . They are generally suspended in dedicated bell towers or shōrō . The oldest extant of these bells date to the late-7th century and have been designated as National Treasures . The bells were either engraved or cast in relief , with outer surfaces showing vertical and horizontal relief bands , a boss ornament on the upper wall that sometimes included text , and handles typically shaped in a dragon motif . [ 33 ] [ 34 ] Thirteen Japanese and one Korean temple bell have been designated as National Treasures . [ 4 ]
The term National Treasure has been used in Japan to denote cultural properties since 1897,
although the definition and the criteria have changed since the introduction of the term. The crafts items in the list adhere to the current definition and have been designated National Treasures according to the Law for the Protection of Cultural Properties that came into effect on June 9, 1951. The items are selected by the Ministry of Education, Culture, Sports, Science and Technology based on their especially high historical or artistic value. The list presents 131 entries from Classical to early modern Japan, spanning from the 7th century Asuka to the 18th century Edo period. The number of items is higher, however, since groups of related objects have been joined as single entries. The listed objects are of many types and include household goods, objects related to Buddhism, armour and harnesses. Some of the oldest objects were imported from China at the time. The listed items consist of materials such as wood over clay or to bronze. Often the articles were decorated using a variety of artistic techniques like gilding of precious metals, line engraving, maki-e, mother of pearl inlay or lacquer. The objects are housed in Buddhist temples, Shinto shrines or museums. The objects in this list represent about half of the 253 National Treasures in the category crafts. They are complemented by 110 swords and 12 Japanese sword mountings National Treasures of the List of National Treasures of Japan (crafts: swords).
Name Artists Remarks Date Type Present location
Temple bell ( 梵鐘 , bonshō ) - Handed down in the Kanzen-in ( 観禅院 ) subtemple ; contains an inscription 0727-12-11 Nara period , December 11 , 727 Bell ; bronze ; aperture : 89.2 cm ( 35.1 in ) , height : 149.0 cm ( 58.7 in ) Nara Nara Kofukuji Kōfuku-ji , Nara , Nara
Temple bell ( 梵鐘 , bonshō ) - Cast for Kinseki-ji ( 金石寺 ) in Hōki Province （in Tottori Prefecture ） ; moved in 1653 to Izumo-taisha , then in 1889 to Tafuku-ji ( 多福寺 ) , Matsubashi-ji ( 松林寺 ) in Shimane Prefecture until being dedicated in 1897 to Saikō-ji 0839 Heian period , 839 Bell ; aperture : 77.5 cm ( 30.5 in ) , height : 136.4 cm ( 53.7 in ) Fukuoka Fukuoka Saikoji Saikō-ji ( 西光寺 ) , Fukuoka , Fukuoka
Temple bell ( 梵鐘 , bonshō ) - Also called Tsurezuregusa ( 徒然草 ) or Ōjikichō ( 黄鐘調 ) ( scale in gagaku , similar to Dorian mode on A ) bell ; fundamental frequency : 129 Hz ; together with the bell at Kanzeon-ji , one of the oldest extant Japanese bells 0698 Nara period , 698 Bell ; bronze ; aperture : 87 cm ( 34 in ) , height : 124 cm ( 49 in ) Kyoto Kyoto Myoshinji Lecture Hall ( 法堂 , hōdō ) at Myōshin-ji , Kyoto
Temple bell ( 梵鐘 , bonshō ) - Without inscription ; cast in Tatara ( 多々良 ) , Kasuya District , Fukuoka , Chikuzen Province using the same mold as the National Treasure bell at Myōshin-ji ; one of the oldest extant Japanese bells 0698 Nara period , ca . 698 Bell ; bronze ; aperture : 86 cm ( 34 in ) , height : 106 cm ( 42 in ) Fukuoka Dazaifu Kanzeonji Kanzeon-ji , Dazaifu , Fukuoka
Temple bell ( 梵鐘 , bonshō ) - Without inscription； long and narrow shape； ｗith cracks and Japanese Honeysuckle arabesque pattern 0710 Nara period Bell ; bronze ; aperture : 85 cm ( 33 in ) , height : 150 cm ( 59 in ) Nara Katsuragi Taimadera belfry ( shōrō ) at Taima-dera , Katsuragi , Nara
Temple bell ( 梵鐘 , bonshō ) - Without inscription ; biggest bell in Japan 0752 Nara period , 752 Bell ; aperture : 271 cm ( 107 in ) , height : 385 cm ( 152 in ) , weight : 49 t ( 48 long tons ; 54 short tons ) Nara Nara Todaiji belfry ( shōrō ) at Tōdai-ji , Nara , Nara
Temple bell ( 梵鐘 , bonshō ) - Dedicated by Dōkyō together with a sacred horse ( 神馬 , shinme ) ; contains inscription 0770-09-11 Nara period , September 11 , 770 Bell ; aperture : 73.9 cm ( 29.1 in ) , height : 109.9 cm ( 43.3 in ) , width : 88.5 cm ( 34.8 in ) , thickness at aperture : 5.8 cm ( 2.3 in ) Fukui Echizen Tsurugi Shrine Tsurugi Shrine ( 劔神社 ) , Echizen , Fukui
Temple bell ( 梵鐘 , bonshō ) - With inscription by Fujiwara no Toshiyuki 0875-08-23 Heian period , August 23 , 875 Bell ; bronze ; aperture : 80.5 cm ( 31.7 in ) , height : 148 cm ( 58 in ) Kyoto Kyoto Jingoji belfry ( shōrō ) at Jingo-ji , Kyoto
Temple bell ( 梵鐘 , bonshō ) - With calligraphy attributed to Ono no Michikaze 0917-11-03 Heian period , November 3 , 917 Bell ; bronze ; diameter : 90 cm ( 35 in ) , height : 150 cm ( 59 in ) Nara Gojo Eisanji Eisan-ji ( 栄山寺 ) , Gojō , Nara
Temple bell ( 梵鐘 , bonshō ) - Decorated with lion , dragon , Chinese phoenix and dancing heavenly nymphs ; previously located in the belfry ( shōrō ) ; one of the Three Great Bells of Japan 1000 Heian period , c. 11th century Bell ; aperture : 123 cm ( 48 in ) , height : 199 cm ( 78 in ) , weight : 2 t ( 2.0 long tons ; 2.2 short tons ) Kyoto Uji Byodoin Byōdō-in Museum Hōshōkan ( 平等院ミュージアム鳳翔館 ) , Byōdō-in , Uji , Kyoto
Temple bell ( 梵鐘 , bonshō ) Mononobe Shigemitsu ( 物部重光 ) Inscription in embossed carving by founder Lanxi Daolong ; donated by Hōjō Tokiyori 1255-02-21 Kamakura period , February 21 , 1255 Bell ; height : 210 cm ( 83 in ) Kanagawa Kamakura Kenchoji belfry ( shōrō ) at Kenchō-ji , Kamakura , Kanagawa
Temple bell ( 梵鐘 , bonshō ) Mononobe Kunimitsu ( 物部国光 ) Made by order of Hōjō Sadatoki ; largest bell in Kantō ; donated by Hōjō Tokiyori 1301-08 Kamakura period , August 1301 Bell ; height : 260 cm ( 100 in ) Kanagawa Kamakura Engakuji Engaku-ji , Kamakura , Kanagawa
Temple bell ( 梵鐘 , bonshō ) - Initially at the west pagoda of Enryaku-ji 's Hōdō-in ( 宝幢院 ) ; contains a three line , 24 characters inscription 0858-08-09 Heian period , August 9 , 858 Bell ; aperture : 55.3 cm ( 21.8 in ) , height : 116.0 cm ( 45.7 in ) Shiga Moriyama Sagawa Art Museum Sagawa Art Museum , Moriyama , Shiga
Korean bell ( 朝鮮鐘 , chōsenshō ) - Head in dragon design , body decorated with clouds and celestial beings ; oldest Korean bell in Japan 0833-03 Silla , March 833 Bell ; aperture : 66.7 cm ( 26.3 in ) , height : 112 cm ( 44 in ) Fukui Tsuruga Jogu Shrine Treasure House at Jōgū Shrine ( 常宮神社 , Jōgū jinja ) , Tsuruga , Fukui