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The E10 series' design was overseen by British design firm, Tangerine,[{{cite web |author= |date=5 March 2025 |title=British influence in JR East's next Shinkansen rolling stock design |url=https://www.railwaygazette.com/high-speed/british-influence-in-jr-easts-next-shinkansen-rolling-stock-design/68399.article |url-access=limited |url-status=live |archive-url=https://web.archive.org/web/20250305105841/https://www.railwaygazette.com/high-speed/british-influence-in-jr-easts-next-shinkansen-rolling-stock-design/68399.article |archive-date=5 March 2025 |access-date=5 March 2025 |website=[[Railway Gazette International]] |publisher=[[DVV Media Group|DVV Media International]]}}] the first overseas designer contracted by JR East for its rolling stock. |
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The E10 series' design was overseen by British design firm, Tangerine,[{{cite web |author= |date=5 March 2025 |title=British influence in JR East's next Shinkansen rolling stock design |url=https://www.railwaygazette.com/high-speed/british-influence-in-jr-easts-next-shinkansen-rolling-stock-design/68399.article |url-access=limited |url-status=live |archive-url=https://web.archive.org/web/20250305105841/https://www.railwaygazette.com/high-speed/british-influence-in-jr-easts-next-shinkansen-rolling-stock-design/68399.article |archive-date=5 March 2025 |access-date=5 March 2025 |website=[[Railway Gazette International]] |publisher=[[DVV Media Group|DVV Media International]]}}] the first overseas designer contracted by JR East for its rolling stock. |
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Externally, the E10 series trains will be finished in a livery of "Tsugaru" (津軽) green and "Evening elm" (イブニングエルム) green that evokes the mountains of Tōhoku region. |
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Externally, the E10 series trains will be finished in a livery of {{Nihongo||津軽|Tsugaru}} green and {{Nihongo|"Evening elm"|イブニングエルム}} green that evokes the mountains of Tōhoku region. |