- Yokoyama, M., 1911b:
- Some Tertiary fossils from the Miike coal-field.
- Journal of the College of Science, Imperial University of Tokyo, vol. 27, art. 20, pp. 1–16, pls. 1–3.
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- Yokoyama, M., 1911c:
- Climatic changes in Japan since the Pliocene epoch.
- Journal of the College of Science, Imperial University of Tokyo, vol. 32, art. 5, pp. 1–16, pl. 1.
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- Yokoyama, M., 1913:
- On two new fossil Cephalopoda from the Tertiary of Izumo.
- Journal of the Geological Society of Tokyo, vol. 20, no. 243, pp. 1–3, pls. 7–8.
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- Yokoyama, M., 1920:
- Fossils from the Miura peninsula and its immediate north.
- Journal of the College of Science, Imperial University of Tokyo, vol. 39, art. 6, pp. 1–193, pls. 1–20.
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- Yokoyama, M., 1922a:
- Fossils from the upper Musashino of Kazusa and Shimosa.
- Journal of the College of Science, Imperial University of Tokyo, vol. 44, art. 1, pp. 1–200 + i–viii, pls. 1–17.
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- Yokoyama, M., 1922b:
- On a new species of Pecten from the Neogene of Japan.
- Journal of the Geological Society of Tokyo, vol. 29, no. 350, pp. 1–2, pl. 5.
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- Yokoyama, M., 1923a:
- On some fossil shells from the island of Saishu in the strait of Tsushima.
- Journal of the College of Science, Imperial University of Tokyo, vol. 44, art. 7, pp. 1–9, pl. 1.
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- Yokoyama, M., 1923b:
- Tertiary Mollusca from Dainichi in Totomi.
- Journal of the College of Science, Imperial University of Tokyo, vol. 45, art. 2, pp. 1–18, pls. 1–2.
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- Yokoyama, M., 1923c:
- On some fossil Mollusca from the Neogene of Izumo.
- Japanese Journal of Geology and Geography, vol. 2, no. 1, pp. 1–9, pls. 1–2.
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- Yokoyama, M., 1923d:
- Tertiary fossils from Kii.
- Japanese Journal of Geology and Geography, vol. 2, no. 3, pp. 47–58, pls. 6–7.
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- Yokoyama, M., 1924a:
- Mollusca from the coral-bed of Awa.
- Journal of the College of Science, Imperial University of Tokyo, vol. 45, art. 1, pp. 1–62 + i–iii, pls. 1–5.
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- Yokoyama, M., 1924b:
- Molluscan remains from the lowest part of the Jo-ban coal-field.
- Journal of the College of Science, Imperial University of Tokyo, vol. 45, art. 3, pp. 1–22, pls. 1–5.
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- Yokoyama, M., 1925a:
- Molluscan remains from the uppermost part of the Jo-ban coal-field.
- Journal of the College of Science, Imperial University of Tokyo, vol. 45, art. 5, pp. 1–34, pls. 1–6.
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- Yokoyama, M., 1925b:
- Molluscan remains from the middle part of the Jo-ban coal-field.
- Journal of the College of Science, Imperial University of Tokyo, vol. 45, art. 7, pp. 1–23, pls. 1–3.
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- Yokoyama, M., 1925c:
- Tertiary Mollusca from Shinano and Echigo.
- Journal of the Faculty of Science, Imperial University of Tokyo, Section 2, vol. 1, pt. 1, pp. 1–23, pls. 1–7.
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- Yokoyama, M., 1925d:
- Mollusca from the Tertiary basin of Chichibu.
- Journal of the Faculty of Science, Imperial University of Tokyo, Section 2, vol. 1, pt. 3, pp. 111–126, pls. 14–15.
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- Yokoyama, M., 1925e:
- On a new species of Cucullaea from Omi.
- Journal of the Geological Society of Tokyo, vol. 32, no. 387, pp. 7–8, pl. 7.
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- Yokoyama, M., 1926a:
- On some Pliocene shells from Kaga and Noto.
- Journal of the Geological Society of Tokyo, vol. 33, no. 391, pp. 9–11, pl. 2.
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- Yokoyama, M., 1926b:
- Tertiary Mollusca from Shiobara in Shimotsuke.
- Journal of the Faculty of Science, Imperial University of Tokyo, Section 2, vol. 1, pt. 4, pp. 127–138, pls. 16–20.
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- Yokoyama, M., 1926c:
- Molluscan fossils from the Tertiary of Mino.
- Journal of the Faculty of Science, Imperial University of Tokyo, Section 2, vol. 1, pt. 7, pp. 213–227, pl. 28.
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