# Japan Chart Navi

> Marine GPS navigation app with nautical charts and fuel estimation. (iPhone/iPad app by FujiDenshi.Com.)

- Source: https://appshunter.io/ios/app/japan-chart-navi/id370079066 (this page in markdown: same URL + `.md`)
- Developer: [FujiDenshi.Com](https://appshunter.io/developer/352213177)
- Category: Navigation, Lifestyle
- Price: Free with in-app purchases
- Rating: 2.00/5 from 4 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 6.0 · 42 MB
- Languages: American English, Japanese
- Released: 2010-07-20
- Data updated: 2026-06-05
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/japan-chart-navi/id370079066/reviews.md

## What is Japan Chart Navi?

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This is a free version for tests. Please try this before you purchase the paid version.
AppStore search screen "map of the sea" to search on other series will be displayed. All 45 will be commercialized by Japan in the Y map charts a single unit. Please wait for a while.
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(To use a lot of memory, iPhone3GS is officially supported or more)

"The iPhone in the sea!" We developed this product based on this slogan. "Navigation map of the sea" is, GPS measured at sea using the current position, orientation to the destination, distance, and for marine navigation applications use to measure the approximate fuel.

Even out of radio at sea, map (Y chart), so in the application has data to confirm the orientation can determine the current location and destination. Jet ski (Jet Marine), and motorboats as, GPS was not designed for use with small boats. iPhone waterproof pack (sold separately) into, the sea is also please phone us. Pick up a signal in coastal areas of Mobile, GPS to locate the precise, you can also request a quick rescue. It also features fuel and easy calculation, you can drift by as much as possible to prevent gas. (Thank you for such use to reference only)

This app, like the Coast Guard Authorization "number of 222 505 Coast Guard permit" (based on publications like Business Law Article 25 water) has received. Partnership with Japan Hydrographic Association also like the latest "for example - motorboat yacht (Y Chart)" is used.

The information is displayed to confirm the position of own ship. For more information about the time of sailing, please use the chart. Datum is used in this figure, "Datum world."


"Map of the Sea Navigation (Select 1)" There are 45 in all. Check the map, like the site Hydrographic Association, "Internet shopping chart" Please confirm. "For example - yacht and motorboat (Y Chart)" You can see a map of the 45 items. The paper map also "Internet shopping chart" I have sold, according Please utilize.


All content and maps please reference purposes only. Regarding the accident using this app, we can not assume any responsibility.

GPS in commercial vessels is common in the leisure boat or jet ski facilities are still not common. The accidents in Japan, I really wish to reduce a little.

## Key features

- GPS-based positioning
- Orientation and distance to destination
- Nautical chart display
- Fuel consumption estimation
- Offline map data
- Coastal area signal reception

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| TOKYO WAN - OMAE SAKI | $11.99 | one-time |
| NORTHERN PART of OSAKA WAN | $11.99 | one-time |
| URAGA SIODO | $11.99 | one-time |
| NAHA - KERAMA RETTO | $11.99 | one-time |
| East Setouchi Area Package | $54.99 | one-time |
| Hokkaido Simple Map | $0.99 | one-time |
| Izu Ogasawara Simple Map | $0.99 | one-time |
| Kyushu Simple Map | $0.99 | one-time |
| Okinawa Simple Map | $0.99 | one-time |
| All Japan Simple Map Package | $4.99 | one-time |


## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/japan-chart-navi/id370079066/reviews.md

### 1/5 — Do not BUY this!

*2012-05-09, version 2.1*

Too much, this. and BUD! Go to NAVIONICS.

### 5/5 — Easy to use. Pretty simple.

*2010-07-20, version 0*

Easy to use. Pretty simple. I want to use in the U.S. charts.

### 5/5 — Japan only?

*2010-07-20, version 0*

I want more maps. But, there is no free ad.

## Frequently asked questions about Japan Chart Navi

### What is Japan Chart Navi?

Japan Chart Navi is a marine navigation application that utilizes GPS to show your current position, heading, and distance to your destination. It also provides access to nautical charts and can help estimate fuel usage for your vessel.

### Does Japan Chart Navi work offline?

Yes, the application has map data that can be confirmed even when out of radio range at sea, allowing you to determine your current location and destination.

### What devices does Japan Chart Navi support?

Japan Chart Navi officially supports iPhone 3GS and newer devices. It is available for iPhone and iPod.

### How accurate is the GPS positioning in Japan Chart Navi?

The app uses GPS to measure your current position at sea. In coastal areas with mobile signals, it can locate you precisely, which could potentially aid in requesting a quick rescue.

### Can Japan Chart Navi help with fuel management?

Yes, the app features easy fuel calculation to help you prevent drifting and manage your gas consumption as much as possible. This is intended for reference purposes.

### What is the age rating for Japan Chart Navi?

Japan Chart Navi has an age rating of 4+, making it suitable for a wide range of users.

### When was Japan Chart Navi last updated?

The latest version of Japan Chart Navi, version 4.0, was last updated on September 30, 2015.

### What is the user rating for Japan Chart Navi?

Japan Chart Navi has a rating of 2.0 stars based on 4 ratings.

## Version history (last 4 releases)

### 4.0 — 2015-09-30

This app has been updated by Apple to display the Apple Watch app icon.

iOS 8 & iOS9 Support !

### 2.1 — 2010-10-28

Area-Map include!

### 1.2 — 2010-07-29

iOS4 Support!

### 1.0 — 2010-07-20

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-05.*