He was Professor of Linguistics at the International Christian University in Tokyo from 1955 to 1963. Subsequently he taught at Yale University; between 1964 and 1970, he was chairman of the department of East and South Asian Languages and Literatures. From 1970 until 1989 he held a similar post at the University of Washington in Seattle. He then taught in Europe, mainly in Germany and Scandinavia.
He wrote extensively on the Japanese language, from A Japanese Reader (1963) and The Japanese Language (1967) to Japanese and the Other Altaic Languages (1971) and Nihongo: In Defense of Japanese (1986). He later broadened his scope by linking Korean both to Japanese and Altaic, most notably in Languages and History: Japanese, Korean, and Altaic (1996).
On the occasion of his 75th birthday, Professors Karl Menges and Nelly Naumann prepared a Festschrift highlighting his career and including articles on Altaic languages.[3]
1976. Studies in the Grammatical Tradition in Tibet. Amsterdam: John Benjamins.
1980. Origins of the Japanese Language: Lectures in Japan during the Academic Year 1977–78. Seattle: University of Washington Press. ISBN0-295-95766-2.
1982. Japan's Modern Myth: The Language and Beyond. Tokyo: John Weatherhill Inc. ISBN0-8348-0168-X.
1986. Nihongo: In Defence of Japanese. London: Athlone Press. ISBN0-485-11251-5.
1993. Prolegomena to the First Two Tibetan Grammatical Treatises. (Wiener Studien zur Tibetologie und Buddhismuskunde 30.) Vienna: Arbeitskreis für Tibetische und Buddhistische Studien Universität Wien.
1996. Languages and History: Japanese, Korean and Altaic. Oslo: Institute for Comparative Research in Human Culture. ISBN974-8299-69-4.
1955a. "Studies in spoken Tibetan I: Phonemics". Journal of the American Oriental Society 75: 46–51.
1955c. "Notes on the Lhasa dialect of the early ninth century". Oriens 8: 284–291.
1955d. "The significance for comparative grammar of some ablauts in the Tibetan number-system". T'oung-pao 43: 287–296.
1955e. "The Independent Status of Lhasa dialect within Central Tibetan". Orbis 4.1: 49–55.
1956. "Segmental diachronic phonology of a Ladakh (Tibetan) dialect". Zeitschrift der Deutschen Morganländischen Gesellschaft 106: 345–362.
1956. "The Tibeto-Burman ablaut system". Transactions of the International Conference of Orientalists in Japan / Kokusai Tōhō Gakusha Kaigi kiyō 1: 29–56.
1957. "The phonology of the Old Burmese vowel system as seen in the Myazedi inscription". Transactions of the International Conference of Orientalists in Japan / Kokusai Tōhō Gakusha Kaigi kiyō 2: 39–43.
1962. "The Si-tu Mahapandita on Tibetan phonology". 湯浅八郎博士古稀記念論文集 / Yuasa Hachirō hakushi koki kinen ronbunshu / To Dr. Hachiro Yuasa; A Collection of Papers Commemorating His Seventieth Anniversary, 921–933. Tokyo: 国際基督教大学 / Kokusai Kirisutokyō Daigaku.
1966. "Early evidence for vowel harmony in Tibetan". Language 42: 252–277.
1967c. "Some problems in Tibetan transcription of Chinese from Tun-huang". Monumenta Serica 27: 123–148 (publ. 1969).
1976. "The Relevance of Historical Linguistics for Japanese Studies". The Journal of Japanese Studies 2.2: 335-388.
1977. "The 'Spirit' of the Japanese Language". The Journal of Japanese Studies 3.2: 251-298.
1978, "Is Tibetan genetically related to Japanese?", in: Proceedings of the Csoma de Körös memorial Symposium, ed. L. Ligeti, Budapest 1978, pp. 295–312.)
2002. "The Middle Mongolian vocalic hiatus". Acta Orientalia Academiae Scientiarum Hungaricae 55.1–3: 179–205.
2008 "The Altaic Aorist in *-Ra in Old Korean". Lubotsky, Alexander, ed. Evidence and counter-evidence : essays in honour of Frederik Kortlandt Amsterdam: Rodopi. (Studies in Slavic and general linguistics; 32–33) 267–282.
1955b. Review of 稻葉正就 Inaba Shōju, チベット語古典文法学 / Chibettogo koten bunpōgaku [Classical Tibetan Language Grammatical Studies] Kyoto: 法藏館 Hōzōkan, 1954 (昭和 Shōwa 29). Language 31: 481–482.
1968. Review of András Róna-Tas, Tibeto-Mongolica: The Loanwords of Mongour and the Development of the Archaic Tibetan Dialects (Indo-Iranian Monographs 7), The Hague: Mouton, 1966. In Language 44.1: 147–168.
1970. Review of R. Burling’s Proto-Lolo-Burmese. Indo-Iranian Journal 12 (1970), 146–159.
1974. "Sino-Tibetan: Inspection of a Conspectus". Journal of the American Oriental Society 94.2: 195–209.
1982. "Linguistic issues in the study of Tibetan Grammar". Wiener Zeitschrift für die Kunde Südasiens und Archiv für indische Philosophie 26: 86–116.
1994. "A new grammar of written Tibetan". Review of Stephen Beyer, The Classical Tibetan Language, Albany: State University of New York Press, 1992. Journal of the American Oriental Society 114.1: 67–76.
2001 Review of Philip Denwood, "Tibetan", (London Oriental and African Language Library, vol. 3). Philadelphia: John Benjamins, 1999. Journal of the American Oriental Society 121.1:125–128.
^Menges, Karl H., and Nelly Naumann (eds.) (1999). Language and Literature – Japanese and the Other Altaic Languages: Studies in Honour of Roy Andrew Miller on His 75th Birthday. Wiesbaden: Harrassowitz Verlag.