Contour Lake Mapping & Custom Charting · Japan · all prices

No maker publishes sales figures. These lists are built from best-seller and most-reviewed proxies (retailer rankings, review volume, awards) over the last five years — the source is shown under each entry.

1. Garmin Navionics Vision+ Japan Inland & Coastal — ¥38,000
   High-resolution relief shading brings Lake Biwa underwater weedlines and ridges into vivid relief.
2. Navionics Platinum+ Japan Inland & Marine — ¥39,800
   3D view and satellite photo overlay indispensable for high-pressure Japanese reservoir fishing.
3. Lowrance Genesis Live Real-Time Mapping JP — ¥0
   Widely used by Japanese tournament pros to create custom micro-contour maps of reservoir timber.
4. Garmin Quickdraw Contours Japan Community — ¥0
   Free community map sharing allows Japanese anglers to download accurate reservoir maps.
5. C-MAP Reveal Lakes Japan Edition — ¥32,000
   Shaded relief mapping uncovers intricate river channels and submerged bridge structures.
6. Navionics Navionics+ Japan Freshwater Standard — ¥24,800
   Detailed 1-foot contours on major Japanese tournament lakes like Biwa, Kasumigaura, and Ashi.
7. Humminbird LakeMaster Custom Biwa Chart — ¥32,000
   Depth highlight shading isolates the prime 4m-6m weedline zone on Lake Biwa effortlessly.
8. ReefMaster ReefMaster 2.0 Japan Bathymetry — ¥28,500
   Advanced bathymetric software used by Japanese guides to build proprietary 3D structure maps.
9. Garmin Navionics Standard Japan Marine — ¥24,000
   Wi-Fi synchronization with ActiveCaptain keeps navigational buoys and hazard spots up to date.
10. C-MAP Discover Japan Coastal & Lakes — ¥22,000
    Clean vector cartography with custom depth color palettes for Japanese reservoir rental boats.