This is a report about the space planning of the commercial theater, which we rebuilt to mix it with office use for high use of land, in order to increase their business profit. We tried some ideas in the planning. The main level of the theater was on the third floor and the greenrooms were on the second floor to increase the flexibility of the first floor. The stage has a high flies. All the seats were within 22m from the stage. The vertical approach from the entrance to the seats wascharacterized as street, and so on. By these ideas, we planned to give the theater enough function and charm aswell as simple theaters.

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This is a summary of the presidential address to the public at the 19th annual meeting of the Japanese Association for Quaternary Research, held at Tottori August 18-20, 1989. The address had two parts: one was an introduction to the concept of “Quaternary” and the significance of Quaternary research, and the other was an elucidation of the discussion at the symposium on “Paleogeography and Paleoenvironments around the coastal areas of the Japan Sea”, exemplified by elephant fossils from the sea-bottom of the southern Japan Sea. The pioneers of Quaternary research in Japan, the German geologists E. NAUMANN and D. BRAUNS, were very interested in the elephant fossils of Japan and published papers on them in 1881 and 1883, respectively. Since that time, the study of elephant fossils and Quaternary research in Japan have been closely related.
Since about 20 years ago, several elephant tusks and molars have been dredged by dragnet fisheries off the San'in district and also off the Noto peninsula in the southern Japan Sea. They were obtained from depths of 120m to 400m, on either the continental shelf or on the drowned bank of the sea-bottom. Formerly, those materials were considered to verify the presence of a landbridge in the past around the area of the Tsushima strait between Korea and Kyushu, but now this idea has come to be rejected. The results of analysis for the boring cores drilled at several places on the bottom of Japan Sea afford much information about paleoenvironmental changes during the Late Pleistocene. For example, an inflow of the Tsushima warm current to the Japan Sea, which is one of the remarkable tributaries of the Kuroshio, was reduced or arrested at that time by mixing with fresh water from the Hwang Ho River running through North China. This created a stagnant condition in the bottom water of the Japan Sea, and much influenced the biotic community there. Again, the inflow of the Tsushima warm current to the Japan Sea was regenerated beginning about 6, 500 y. B. P.
The elephant fossils on the sea-bottom consist of tusks and molars of Naumann's elephant Palaeoloxodon naumanni and a molar tooth of woolly mammoth Mammuthus primigenius. The radiocarbon dating carried out for these and others found on land showed that the former was older than 30, 000 y. B. P. and the latter was younger, around 20, 000 y. B. P. It is known that during the maximal cold phase in the Last Glacial, woolly mammoths came down from Siberia southward to Hokkaido, but did not cross over the Tsugaru strait to Honshu. Therefore, it is reasonable to assume that the remains of woolly mammoths would be transported by drifting from the Hwang Ho area to that off San'in and then sink to the bottom of the Japan Sea. However, the idea is still a matter of imagination, more investigation for the environmental changes during the Quaternary in Japan needs to be done.

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I. History of studies 1. Dawn of research 2. Development (2.1 Progress of phylogenetic studies,2.2 Development of stratigraphic studies, 2.3 Studies of morphological reconstructions) 3. Period of new studies (3.1 Phylogenetic problems, 3.2 Mutations, 3.3 Chronology and distribution) II. Localities 1. On the previous and updated locality list 2. Updated locality list (2.1 Hokkaido and Tohoku regions, 2.2 Kanto region, 2.3 Chubu region, 2.4 Kinki, Chugoku, Shikoku and Kyusyu regions) III. Stratigraphic distribution 1. Study history 2. Age of first appearance 3. Formation of the Kanto Plain and sediments including P. naumanni (3.1 Transition of the plain and sedimentary environment, 3.2 Sedimentary facies and mode of occurrence of P. naumanni on the Boso Peninsula, 3.3 Occurrence in Tokyo) 4. Age of extinction and causes (4.1 Age of extinction, 4.2 Causes of extinction) IV. Morphology 1. Morphology of each part (1.1 Cranium, 1.1.1 Terminology, 1.1.2 Characteristics, 1.1.3 Sex dimorphism 1.2 Mandible, 1.3 Tusks, 1.4 Molars, 1.4.1 Characteristics of the genus, 1.4.2 species characteristics of the species, 1.4.3 Characteristics of upper and lower molars,1.4.4 Differences of tooth type, 1.4.5 Variation of molars n regional populations,1.4.6 Morphological changes due to occlusal wear and age assessment, 1.4.7 Sex dimorphism in molars,1.4.8 Pathological morphology, 1.4.9 Histological and biochemical studies, 1.5Hyoid bones, 1.5.1 Morphology of the stylohyoid, 1.5.2 Features and variation of the stylohyoid, 1.6 Axial skeleton, 1.6.1 Spinal column and vertebrae, 1.6.2 Ribs, 1.7 Limbs, 1.7.1Scapula, 1.7.2 Humerus, 1.7.3 Ulna, 1.7.4 Radius, 1.7.5 Forefoot bones (carpus metacarpus, phalanges), 1.7.6 Innominate bone, 1.7.7 Femur,1.7.8 Patella, 1.7.9 Tibia, 1.7.10 Fibula, 1.7.11 Hind foot bones (tarsus, metatarsus, phalanges) 2. Reconstructions (2.1 Skeletal reconstructions, 2.2 Biological reconstructions) 3. Fossil Footprints V. Phylogeny and classification 1. Taxonomic position of the genus Palaeoloxodon 2. Dispersal of the genus Palaeoloxodon 3. Taxonomic position of P. naumanni VI. Habitat and fauna 1. Habitat 2. Vertical distribution 3. Fauna (3.1 Pleistocene terrestrial mammalian stratigraphy, 3.2 Mammals coexisting with P. naumanni, 3.3 Two faunas of the Late Pleistocene)

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