>>1452466Was trying to make a map but, if you don't mind a wall of text with brief analysis only:
JR Haneda Access Rinkai Route, Keiyo Line, Rinkai Line, Yurakucho Line
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Maihama Station (Keiyo Line Rapid; TDR)
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|>-- Keiyo-Sobu Line quad-tracking
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Urayasu Station (Tozai Line Rapid)
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Mizue Station (quad-track)
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Shin-Koiwa -- Koiwa stations section new station
| Possible sharing on Shin-Kin Freight Line
Keisei Takasago Station (coordinate with grade-separating Takasago Depot at-grade road crossings)
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Kameari / Ayase station (interface with Tokyo Line 11 extension; extend Kita-Ayase Branch Line to Yashio Station?)
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Nishiarai Station
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Akabane Station
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Toei Mita Line (cf Tobu Takushimadaira Line interconnection, Tobu Nishi-Ita Line)
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Kami-Itadabashi (quad-track ;cf Tobu Keishi Line) /
Tobu Nerima (development opportunities?) / Narimasu (Exp stop) / Wakou-shi (Yuracho-Fukutoshin line, Wakou Depot) station
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Nerima (interface with Seibu Toshima Line) / Hikarigaoka / Oedo Line Oizumi-Gakuen extension station
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Saginomiya (Exp stop) / Kami-Shakujii (coordinate with grade-separation; Kami-Shakujii Depot; cf Seibu Shinjuku Line quad-tracking) station
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Ogikubo (interface with Kugayama Depot) / Kichijouji (interface with Keio Inokashira Line) / Mitaka (Mitaka Depot; cf Seibu Tamagawa Line extension) station
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Sakura-jousui (has depot; extend Toukyu Setagaya Line?) / Hachiman-yama / Chitose-Karasuyama station (Extend Honan-cho Branch Line?)
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Kyodo / Seijogakuen-mae station
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Sakura-shimmachi / Futako-Tamagawa station
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Various possibilities depending on Oimachi Line, Ikegami Line, Tokyu Tamagawa Line, Kama-Kama Line, possible Asakua Line extension, Nambu Line, Hinkaku Line, Mushashino Freight Line, Yokohama Green Line, Kawasaki metro, Keikyu Daishi Line, Tsurumi Line, Tokaido Freight Line, JR Haneda Access
