NDC(Nippon Decimal Classification)
| 000 | General works | 010 | Libraries |
| 020 | Books and Bibliography | ||
| 030 | General encyclopedias | ||
| 040 | General collected essays | ||
| 050 | General serial publications | ||
| 060 | General societies. Academies | ||
| 070 | News papers . Journalism | ||
| 080 | General collections | ||
| 090 | Hometown materials. Valuable books. Special collections | ||
| 100 | Philosophy | 110 | Philosophy - Special treatises on philosophy |
| 120 | Oriental thought | ||
| 130 | Western philosophy | ||
| 140 | Psychology | ||
| 150 | Ethics. Morals | ||
| 160 | Religion -History of religions | ||
| 170 | Shintoism | ||
| 180 | Buddhism | ||
| 190 | Christianity-History of Christianity | ||
| 200 | General history | 210 | History - General history of Japan |
| 220 | General history of Asia | ||
| 230 | General history of Europe | ||
| 240 | General history of Africa | ||
| 250 | General history of North America | ||
| 260 | General history of South America | ||
| 270 | General history of Occeania | ||
| 280 | General biography | ||
| 290 | General geography. Description and travel | ||
| 300 | Social science | 310 | Political science |
| 320 | Law | ||
| 330 | Economics | ||
| 340 | Public finance | ||
| 350 | Statistics | ||
| 360 | Society | ||
| 370 | Education | ||
| 380 | Customs and folklore | ||
| 390 | National defense. Military science | ||
| 400 | Natural science | 410 | Mathematics |
| 420 | Physics | ||
| 430 | Chemistry | ||
| 440 | Astronomy. Space sciences | ||
| 450 | Earth sciences. Geology | ||
| 460 | Biology | ||
| 470 | Botany | ||
| 480 | Zoology | ||
| 490 | Medical science | ||
| 500 | Technology. Engineering | 510 | Construction. Civil engineering |
| 520 | Architecture. Building | ||
| 530 | Mechanical engineering | ||
| 540 | Electrical engineering | ||
| 550 | Maritime engineering | ||
| 560 | Metal and mining engineering | ||
| 570 | Chemical technology | ||
| 580 | Manufactures | ||
| 590 | Domestic arts and sciences | ||
| 600 | Industry and commerce | 610 | Agriculture |
| 620 | Horticulture | ||
| 630 | Sericulture. Silk industry | ||
| 640 | Animal husbandry | ||
| 650 | Forestry | ||
| 660 | Fishing industry. Fisheries | ||
| 670 | Commerce | ||
| 680 | Transportation services | ||
| 690 | Communication services | ||
| 700 | The arts. Fine arts | 710 | Sculpture. Plastic arts |
| 720 | Painting. Pictorial arts | ||
| 730 | Engraving | ||
| 740 | Photography and photographs | ||
| 750 | Industrial arts | ||
| 760 | Music | ||
| 770 | Theater | ||
| 780 | Sports and physical training | ||
| 790 | Accomplishments and amusements | ||
| 800 | Language | 810 | Japanese |
| 820 | Chinese and Oriental languages | ||
| 830 | English | ||
| 840 | German | ||
| 850 | French | ||
| 860 | Spanish | ||
| 870 | Italian | ||
| 880 | Russian | ||
| 890 | Other minor languages | ||
| 900 | Literature | 910 | Japanese literature |
| 920 | Chinese and Other oriental literature | ||
| 930 | British and American literature | ||
| 940 | German literature | ||
| 950 | French literature | ||
| 960 | Spanish literature | ||
| 970 | Italian literature | ||
| 980 | Russian and Soviet literature | ||
| 990 | Literature of other languages |
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