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    • Home
    • Fishing in Japan
      • Guide to Fishing in Japan
      • Freshwater Fishing Japan
      • Saltwater Fishing Japan
      • Fishing in Tokyo
      • Urban Fishing Japan
      • Fishing History & Culture
      • Permits & Regulations
    • Tenkara
      • A Guide to Tenkara
      • Tenkara Equipment
      • Essential Tenkara Knots
      • Awesome Tenkara Locations
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      • Fly Fishing
      • Fly Fishing Equipment
      • How to Read a River
    • Travel to Japan
      • Why Travel to Japan?
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      • Buying Tackle in Japan
      • What to Bring to Japan
    • About Japan Anglers
  • Home
  • Fishing in Japan
    • Guide to Fishing in Japan
    • Freshwater Fishing Japan
    • Saltwater Fishing Japan
    • Fishing in Tokyo
    • Urban Fishing Japan
    • Fishing History & Culture
    • Permits & Regulations
  • Tenkara
    • A Guide to Tenkara
    • Tenkara Equipment
    • Essential Tenkara Knots
    • Awesome Tenkara Locations
  • Intro to Fly Fishing
    • Fly Fishing
    • Fly Fishing Equipment
    • How to Read a River
  • Travel to Japan
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    • Onsens and Ryokans
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Finding Fish with Japan Anglers

How to Read a River: Finding the Fish

For a beginner, a river may look like a chaotic rush of water. For a seasoned angler, it’s a living map, with every ripple, eddy, and seam pointing to where a fish might be hiding. Learning to "read a river" is a crucial skill that separates a successful day of fishing from a frustrating one. It's the art of understanding how water moves and how fish use that movement to their advantage.


Fish are not everywhere in a river. They hide in specific spots to conserve energy and find food. Your goal is to identify these high-probability areas and present your fly in a way that looks natural and appealing.

The Two Golden Rules of Reading a River

Before you even make a cast, remember these two simple rules:

Fish are Lazy

Fish want to eat, but they don't want to work for it. They will hold in a spot that offers a constant supply of food but requires minimal energy to stay in.

Fish Need Cover

Fish are always looking for a place to hide from predators, bright sunlight, and strong currents. This "cover" can be a deep pool, a submerged rock, or an undercut bank.

The Prime Locations: Where to Look

Riffles

These are the shallow, choppy sections of a river where the water is aerated and oxygen-rich.

  • Why fish are here: The turbulent water dislodges food from the riverbed, creating a constant "conveyor belt" of meals for the fish.
  • How to fish it: Cast your fly upstream of the riffle and let it drift naturally through the choppy 

Eddies and Seams

An eddy is an area of slow-moving water, often found just behind a large rock or a sharp bend in the river. A seam is the line where the slow water of the eddy meets the fast-moving main current.

  • Why fish are here: Fish will sit in the calm water of the eddy, waiting for food to be delivered to them by the main current along the seam.
  • How to fish it: Cast your fly into the fast current and let it drift along the seam and into the eddy.

Deep Pools

A deep, slow-moving pool offers a great place for a fish to rest and find shelter from predators.

  • Why fish are here: Deeper water provides a sense of security for larger fish, and they will often hold at the head or tail of a pool, waiting for food.
  • How to fish it: Fish the edges of the pool first, then cast into the deeper water.

Structure

Anything that breaks the flow of the water is a potential home for a fish.

  • Why fish are here: Submerged rocks, logs, fallen trees, and undercut banks all provide a place for a fish to hide from the current and rest in a calm spot.
  • How to fish it: Cast your fly as close as possible to the structure. The fish will be holding right next to the calm water, ready to strike at a moment's notice.

By understanding these basic principles, you can approach any river with confidence. Instead of casting randomly, you can cast with purpose, knowing that you're presenting your fly exactly where a fish is most likely to be.

  • Guide to Fishing in Japan
  • Freshwater Fishing Japan
  • Saltwater Fishing Japan
  • Fishing in Tokyo
  • Urban Fishing Japan
  • Fishing History & Culture
  • Permits & Regulations
  • A Guide to Tenkara
  • Tenkara Equipment
  • Essential Tenkara Knots
  • Awesome Tenkara Locations
  • Fly Fishing
  • Fly Fishing Equipment
  • How to Read a River
  • Why Travel to Japan?
  • Onsens and Ryokans
  • Buying Tackle in Japan
  • What to Bring to Japan
  • About Japan Anglers
  • Contact Us

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