| Last Name | First Name | Year | City Sort descending | Section/Speaker Type |
|---|---|---|---|---|
| Kato | Kazuya | 1990 | Kyoto | Number Theory |
| Kawamata | Yujiro | 1990 | Kyoto | Algebraic Geometry |
| Kemer | Alexander R. | 1990 | Kyoto | Algebra |
| Kollár | János | 1990 | Kyoto | Algebraic Geometry |
| Kolyvagin | Victor Alecsandrovich | 1990 | Kyoto | Number Theory |
| Kotani | Shinichi | 1990 | Kyoto | Probability & Mathematical Statistics |
| Krasny | Robert | 1990 | Kyoto | Computational Methods |
| Krichever | Igor | 1990 | Kyoto | Mathematical Physics |
| Kronheimer | Peter B. | 1990 | Kyoto | Geometry |
| Kupiainen | Antti | 1990 | Kyoto | Mathematical Physics |
| Kusuoka | Shigeo | 1990 | Kyoto | Probability & Mathematical Statistics |
| Laumon | Gérard | 1990 | Kyoto | Number Theory |
| Lazarsfeld | Robert K. | 1990 | Kyoto | Algebraic Geometry |
| Le Cam | Lucien M. | 1990 | Kyoto | Probability & Mathematical Statistics |
| Lebeau | Gilles | 1990 | Kyoto | Partial Differential Equations |
| Lin | Fang Hua | 1990 | Kyoto | Partial Differential Equations |
| Lions | Pierre-Louis | 1990 | Kyoto | Partial Differential Equations |
| Lovász | László | 1990 | Kyoto | Plenary |
| Lusztig | George | 1990 | Kyoto | Plenary |
| Lützen | Jesper | 1990 | Kyoto | History, Teaching & Nature of Mathmatics |
| Majda | Andrew J. | 1990 | Kyoto | Plenary |
| Manin | Yuri Ivanovich | 1990 | Kyoto | History, Teaching & Nature of Mathmatics |
| Margulis | Grigorii A. | 1990 | Kyoto | Plenary |
| Mathieu | Oliver | 1990 | Kyoto | Lie Groups & Representation |
| Matsuki | Toshihiko | 1990 | Kyoto | Lie Groups & Representation |