Shinjuku is one of those Tokyo neighbourhoods that sounds like an exaggeration until you're standing in the middle of it. Three million people pass through the station every single day. The east side is a wall of neon and noise that starts at Kabukicho and doesn't really stop until you're deep into Golden Gai or lost in the smoky alleys of Omoide Yokocho. The west side is all corporate towers and government buildings, which sounds dull until you realise one of them has a free observation deck on the 45th floor with views to Mount Fuji. And then, somehow, tucked behind all of this, there's a 144-acre garden with three different landscaping traditions and the best cherry blossom viewing in the city.
The range is the thing. You can start your morning in serene Japanese gardens, spend the afternoon sampling wagyu in a department store basement, eat a ¥900 bowl of former-Michelin-star ramen for dinner, and end the night singing karaoke with strangers in a bar the size of a walk-in wardrobe. Shinjuku accommodates all of this within walking distance. It's intense and occasionally overwhelming, but once you understand the different pockets of the neighbourhood, it becomes one of the most rewarding areas in Tokyo to explore properly.
Here is how to spend your time.