Greater East Asia Railroad (大東亜縦貫鉄道, Daitōa Jūkan Tetsudō) was an idea for a railroad linking Japan with the Asian mainland and Europe, formulated in 1938 during the Second Sino-Japanese War leading to World War II. Part of the plan included a tunnel or bridge somewhat similar to the more recent Japan–Korea Undersea Tunnel proposal.

You can help expand this article with text translated from the corresponding article in Japanese. (June 2020) Click [show] for important translation instructions. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Consider adding a topic to this template: there are already 3,394 articles in the main category, and specifying|topic= will aid in categorization. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Japanese Wikipedia article at [[:ja:大東亜縦貫鉄道]]; see its history for attribution. You may also add the template {{Translated|ja|大東亜縦貫鉄道}} to the talk page. For more guidance, see Wikipedia:Translation.

This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. (April 2019)

A report published in 1942 titled 大東亜縦貫鉄道に就て (About the Greater East Asia Through Railway) presents the following routes as proposals:

• Daiichi through rail corridor (第1縦貫鉄道群), Connecting Tokyo and Syonan-to

1. Tokyo – Shimonoseki – Pusan – Fengtian (present day Shenyang) – Tianjin – Beijing – Hankou – Hengyang – Guilin – Liuzhou – Nanning – Trấn Nam Quan – Xóm Cục – Thakhek – Kumphawapi – Bangkok – Padang Besar – Syonan-to (present day Singapore)
2. A separate line to 1. that splits from Tianjin for Nanjing
3. Sea route linking Nagasaki to Shanghai that merges to 1.

• Daini through rail corridor (第2縦貫鉄道群), Branch line of Daiichi through railway

1. Bangkok – Ban Pong – Thanbyuzayat – Rangoon (present day Yangon) – Kyangin – Chittagong (Partially completed as the military use Thai-Burma Railway)
2. Changsha – Changde – Kunming – Lashio – Mandalay – Chittagong

• Daisan through rail corridor (第3縦貫鉄道群), Connection between Japan and its ally Germany

1. Tokyo – Shimonoseki – Pusan – Fengtian – Harbin – Manzhouli – Irkutsk – Moscow – Berlin (utilizes the Siberian Railway)
2. Tokyo – (Kobe or Moji) – Tianjin – Zhangjiakou – Baotou – Suzhou – Anxi – Hami – Kashgar – Kabul – Baghdad – Istanbul – Berlin (Trans-Central Asia Railway Project)
3. Tokyo – (Nagasaki) – Shanghai – Kunming – Rangoon – Calcutta (present day Kolkata) – Peshawar – Kabul – Baghdad – Istanbul – Berlin

• South Manchuria Railway
• Trans-Asian Railway
• Greater East Asia Co-Prosperity Sphere