Shinjyku station is complex and large. 5 railway company locates each station and 31 platforms. Number of passengers getting on and off is 2572644 people/day, it's a top of the world.
JR Shinjyuku station, 757013 people/day
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#1,2,3,4 Saikyo line, Shonan-shinjyuku line
#5,6 Chuo line, Inter city
#7,8 Chuo line, rapid service (for Tokyo)
#9,10 Under construction (Chuo line)
#11,12 Chuo line, rapid service (for Takao)
#13,16 Sobu-chuo line
#14,15 Yamanote line
ODAKYU Shinjyuku station, 490081 people/day
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#1,6 Discharge
#2,3 Limited express
#4,5 Express
#7,10 Discharge (Underground)
#8,9 Local (Underground)
KEIO Shinjyuku station (Underground), 726653 people/day
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#1 Local
#2 Express, Local
#3 Express
TOEI, KEIO Shinsen-Shinjyuku station (Underground), 242909 people/day
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#4,5 Shinjyuku line (Subway)
TOEI Shinjyuku station (Underground), 117494 people/day
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#6,7 Oedo line (Subway)
Metro Shinjyuku station (Underground), 238494 people/day
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#1,2 Marunouchi line (Subway)