| Year | Date | Age | Event |
| 1882 | Dec. 23 | 0 | Born in Hashiba, Tokyo |
| 1897 | Sept. | 14 | Entered Tokyo National University of Fine Arts and Music |
| 1905 | | 22 | Opened Korindo, a retail store of various goods, in Yaesu, Tokyo |
| 1907 | | 24 | Opened Okada Company, Ltd., a wholesale business of women’s accessories, in Kyōbashi, Tokyo |
| 1915 | | 32 | Invented the Asahi Diamond, an accessory, and obtained a patent from ten countries |
| 1919 | | 36 | Gets into major financial trouble with the bankruptcy of his supplier bank |
| June | 36 | Death of his first wife after she gives birth to her third child (all three children died either at birth or soon after birth) |
| 1920 | Feb. | 37 | Turned Okada Company in to Okada Company, Ltd. in order to restore the business due to the economic crisis after World War I damaging his business again |
| June | 37 | Developed interest in religion after suffering from various unhappiness |
| 1923 | Sept. 1 | 40 | Experienced the Great Kanto Earthquake |
| 1928 | Feb. | 45 | Left his business behind and focused on salvation activities centered on treating people with illness |
| 1934 | May 1 | 51 | Originated Okada Purifying Therapy |
| 1935 | Sept. 5 | 52 | Announced the Wellness Center Concept |
| 1936 | Feb. | 53 | Began research on the Nature Farming Method |
| May 15 | 53 | Established the Health Association |
| 1944 | May 5 | 61 | Moved to Gôra in Hakone, Kanagawa Prefecture; begins construction of Shinsenkyô (Land of Eternal Happiness) in 1945 |
| 1945 | Dec. 7 | 62 | Purchased land in Atami City, Shizuoka Prefecture; began construction of Zuiunkyô (Land of Auspicious Clouds) in Momoyama, Atami in 1946 |
| 1949 | March 8 | 66 | Published the Zuisenkyô (Health Oasis) Concept |
| 1951 | May | 68 | Lectured on “Creation of a True Civilization” at the Hibiya Public Hall in Tokyo |
| 1952 | June 15 | 69 | Completed the Hakone Museum of Art in Shinsenkyô |
| Sept. 15 | 69 | Established the Tomei Art Preservation Society (forerunner of the current MOA Art and Culture Foundation) |
| 1953 | Dec. 1 | 70 | Inaugurated the Society to Popularize Nature Farming |
| 1954 | Feb. 4 | 71 | Obtained “Red and White Plum Blossom Screens” by Ogata Kôrin (Japan’s National Treasure) |
| 1955 | Feb. 8 | 72 | Obtained “Tea-Leaf Jar” by Nonomura Ninsei (Japan’s National Treasure) |
| Feb. 10 | 72 | Okada passes away in Atami |
