Tools & Wizards About Us
umitenki.jp screenshot

Report Summary

  • 24

    Performance

    Renders faster than
    43% of other websites

  • 83

    Accessibility

    Visual factors better than
    that of 54% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 72

    SEO

    Google-friendlier than
    31% of websites

umitenki.jp

海天気.jp｜海の天気予報 無料で使える天気、風、気温、波浪（波高）、潮汐などアウトドア愛好家のみならず普段使いでも便利！

Page Load Speed

1.9 sec in total

First Response

25 ms

Resources Loaded

1.7 sec

Page Rendered

201 ms

umitenki.jp screenshot

About Website

Welcome to umitenki.jp homepage info - get ready to check Umitenki best content for Japan right away, or after learning these important things about umitenki.jp

海天気.jpは無料で使える海洋気象情報サイト。マリンスポーツ、レジャー、釣り、その他日常生活でも活用できる海の天気予報。全国8000スポット以上の天気予報や風向風速、波浪予測、潮汐などの気象データをスポット配信！

Visit umitenki.jp

Key Findings

We analyzed Umitenki.jp page load time and found that the first response time was 25 ms and then it took 1.9 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

umitenki.jp performance score

24

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.0 s

51/100

10%

LCP (Largest Contentful Paint)

Value6.2 s

11/100

25%

SI (Speed Index)

Value10.7 s

7/100

10%

TBT (Total Blocking Time)

Value7,950 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value30.7 s

0/100

10%

Network Requests Diagram

umitenki.jp

25 ms

umitenki.jp

427 ms

www.umitenki.jp

453 ms

js

95 ms

js

174 ms

Our browser made a total of 38 requests to load all elements on the main page. We found that 68% of them (26 requests) were addressed to the original Umitenki.jp, 8% (3 requests) were made to Googletagmanager.com and 5% (2 requests) were made to Securepubads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (764 ms) relates to the external source Flux-cdn.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 71.8 kB (10%)

Content Size

690.1 kB

After Optimization

618.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Umitenki.jp main page is 690.1 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 65% of websites need less resources to load. Javascripts take 357.6 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 34.4 kB

  • Original 43.5 kB
  • After minification 39.0 kB
  • After compression 9.1 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 34.4 kB or 79% of the original size.

Image Optimization

-11%

Potential reduce by 28.2 kB

  • Original 265.0 kB
  • After minification 236.8 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Obviously, Umitenki needs image optimization as it can save up to 28.2 kB or 11% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-0%

Potential reduce by 947 B

  • Original 357.6 kB
  • After minification 357.6 kB
  • After compression 356.6 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. This website has mostly compressed JavaScripts.

CSS Optimization

-35%

Potential reduce by 8.3 kB

  • Original 24.0 kB
  • After minification 24.0 kB
  • After compression 15.7 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Umitenki.jp needs all CSS files to be minified and compressed as it can save up to 8.3 kB or 35% of the original size.

Requests Breakdown

Number of requests can be reduced by 13 (37%)

Requests Now

35

After Optimization

22

  • Images
  • JavaScript
  • CSS

The browser has sent 35 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Umitenki. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

umitenki.jp

umitenki.jp

25 ms

umitenki.jp

umitenki.jp

427 ms

www.umitenki.jp

www.umitenki.jp

453 ms

js

js

95 ms

js

js

174 ms

style.css

style.css

20 ms

jquery-3.3.1.min.js

jquery-3.3.1.min.js

30 ms

common.js

common.js

63 ms

gpt.js

gpt.js

121 ms

flux_umitenki_AS_TM_AT.min.js

flux_umitenki_AS_TM_AT.min.js

764 ms

gpt.js

gpt.js

118 ms

wrapper.min.js

wrapper.min.js

703 ms

history_menu_smart.css

history_menu_smart.css

62 ms

gtm.js

gtm.js

157 ms

apstag.js

apstag.js

141 ms

main_logo.png

main_logo.png

26 ms

search_input.svg

search_input.svg

26 ms

map_icon_pc.svg

map_icon_pc.svg

103 ms

myplace_icon_pc.svg

myplace_icon_pc.svg

62 ms

genre.png

genre.png

63 ms

location.png

location.png

102 ms

pref.png

pref.png

110 ms

tide.jpg

tide.jpg

109 ms

wave_simu.jpg

wave_simu.jpg

109 ms

amagumo.jpg

amagumo.jpg

109 ms

area_weather.jpg

area_weather.jpg

127 ms

sea_temp.jpg

sea_temp.jpg

130 ms

sea_cur.jpg

sea_cur.jpg

128 ms

weather_map.jpg

weather_map.jpg

129 ms

typhoon.jpg

typhoon.jpg

128 ms

pub_weather.jpg

pub_weather.jpg

131 ms

sdk.js

sdk.js

102 ms

umiten_mhc_history.png

umiten_mhc_history.png

219 ms

black_pin.svg

black_pin.svg

219 ms

pubads_impl.js

pubads_impl.js

34 ms

sdk.js

sdk.js

111 ms

main.js

main.js

106 ms

42 ms

Accessibility Review

umitenki.jp accessibility score

83

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

button, link, and menuitem elements do not have accessible names.

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

umitenki.jp best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

umitenki.jp SEO score

72

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document doesn't use legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    JA

  • Language Claimed

    N/A

  • Encoding

    SHIFT_JIS

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Umitenki.jp can be misinterpreted by Google and other search engines. Our service has detected that Japanese is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Umitenki.jp main page’s claimed encoding is shift_jis. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

umitenki.jp

Open Graph data is detected on the main page of Umitenki. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: