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91 yahoo.co.jp Last Updated: 3 months

Success 62% of passed verification steps
Warning 15% of total warning
Errors 23% of total errors, require fast action

Desktop

Mobile

Performance Desktop Score 87%
Best Practices Desktop Score 92%
SEO Desktop Score 83%
PWA Desktop Score 33%
Performance Mobile Score 39%
Best Practices Mobile Score 83%
SEO Mobile Score 99%
PWA Mobile Score 40%
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Social Data

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Estimation Traffic and Earnings

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Desktop

Desktop Screenshot
Server Backend Latencies 0 ms
Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance
Eliminate render-blocking resources Potential savings of 190 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles
Keep request counts low and transfer sizes small 124 requests • 1,410 KiB
To set budgets for the quantity and size of page resources, add a budget.json file
Serve static assets with an efficient cache policy 65 resources found
A long cache lifetime can speed up repeat visits to your page
Serve images in next-gen formats Potential savings of 193 KiB
Image formats like WebP and AVIF often provide better compression than PNG or JPEG, which means faster downloads and less data consumption
Minimize main-thread work 2.1 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
Web app manifest or service worker do not meet the installability requirements 1 reason
Service worker is the technology that enables your app to use many Progressive Web App features, such as offline, add to homescreen, and push notifications. With proper service worker and manifest implementations, browsers can proactively prompt users to add your app to their homescreen, which can lead to higher engagement
Avoid chaining critical requests 7 chains found
The Critical Request Chains below show you what resources are loaded with a high priority. Consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load
Largest Contentful Paint element 1 element found
This is the largest contentful element painted within the viewport
Avoid an excessive DOM size 1,841 elements
A large DOM will increase memory usage, cause longer [style calculations](https://developers.google.com/web/fundamentals/performance/rendering/reduce-the-scope-and-complexity-of-style-calculations), and produce costly [layout reflows](https://developers.google.com/speed/articles/reflow)
Avoid serving legacy JavaScript to modern browsers Potential savings of 18 KiB
Polyfills and transforms enable legacy browsers to use new JavaScript features. However, many aren't necessary for modern browsers. For your bundled JavaScript, adopt a modern script deployment strategy using module/nomodule feature detection to reduce the amount of code shipped to modern browsers, while retaining support for legacy browsers
Reduce unused CSS Potential savings of 44 KiB
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity
Minimize third-party usage Third-party code blocked the main thread for 130 ms
Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading
Avoids enormous network payloads Total size was 1,410 KiB
Large network payloads cost users real money and are highly correlated with long load times
Efficiently encode images Potential savings of 84 KiB
Optimized images load faster and consume less cellular data
Avoid long main-thread tasks 5 long tasks found
Lists the longest tasks on the main thread, useful for identifying worst contributors to input delay
Max Potential First Input Delay 130 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task
JavaScript execution time 0.9 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this
Avoid non-composited animations 15 animated elements found
Animations which are not composited can be janky and increase CLS
Reduce unused JavaScript Potential savings of 164 KiB
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity
Time to Interactive 2.4 s
Time to interactive is the amount of time it takes for the page to become fully interactive
Reduce initial server response time Root document took 930 ms
Keep the server response time for the main document short because all other requests depend on it
Total Blocking Time 80 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds
First Contentful Paint 0.6 s
First Contentful Paint marks the time at which the first text or image is painted
Speed Index 2.3 s
Speed Index shows how quickly the contents of a page are visibly populated
First Meaningful Paint 1.4 s
First Meaningful Paint measures when the primary content of a page is visible
Properly size images Potential savings of 305 KiB
Serve images that are appropriately-sized to save cellular data and improve load time
Largest Contentful Paint 1.6 s
Largest Contentful Paint marks the time at which the largest text or image is painted
User Timing marks and measures 2 user timings
Consider instrumenting your app with the User Timing API to measure your app's real-world performance during key user experiences
Network Round Trip Times 0 ms
Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance

Mobile

Mobile Screenshot
Avoid serving legacy JavaScript to modern browsers Potential savings of 42 KiB
Polyfills and transforms enable legacy browsers to use new JavaScript features. However, many aren't necessary for modern browsers. For your bundled JavaScript, adopt a modern script deployment strategy using module/nomodule feature detection to reduce the amount of code shipped to modern browsers, while retaining support for legacy browsers
Avoid large layout shifts 2 elements found
These DOM elements contribute most to the CLS of the page.
First Contentful Paint 3.8 s
First Contentful Paint marks the time at which the first text or image is painted
Document uses legible font sizes 79.7% legible text
Font sizes less than 12px are too small to be legible and require mobile visitors to “pinch to zoom” in order to read. Strive to have >60% of page text ≥12px
Enable text compression Potential savings of 18 KiB
Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes
Eliminate render-blocking resources Potential savings of 200 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles
Largest Contentful Paint element 1 element found
This is the largest contentful element painted within the viewport
Avoid multiple page redirects Potential savings of 780 ms
Redirects introduce additional delays before the page can be loaded
Web app manifest or service worker do not meet the installability requirements 1 reason
Service worker is the technology that enables your app to use many Progressive Web App features, such as offline, add to homescreen, and push notifications. With proper service worker and manifest implementations, browsers can proactively prompt users to add your app to their homescreen, which can lead to higher engagement
Max Potential First Input Delay 750 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task
Avoid chaining critical requests 4 chains found
The Critical Request Chains below show you what resources are loaded with a high priority. Consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load
Includes front-end JavaScript libraries with known security vulnerabilities 2 vulnerabilities detected
Some third-party scripts may contain known security vulnerabilities that are easily identified and exploited by attackers
Reduce unused JavaScript Potential savings of 51 KiB
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity
Avoid non-composited animations 1 animated element found
Animations which are not composited can be janky and increase CLS
Serve images in next-gen formats Potential savings of 50 KiB
Image formats like WebP and AVIF often provide better compression than PNG or JPEG, which means faster downloads and less data consumption
First Contentful Paint (3G) 7890 ms
First Contentful Paint 3G marks the time at which the first text or image is painted while on a 3G network
Largest Contentful Paint 3.8 s
Largest Contentful Paint marks the time at which the largest text or image is painted
First Meaningful Paint 3.8 s
First Meaningful Paint measures when the primary content of a page is visible
Reduce the impact of third-party code Third-party code blocked the main thread for 1,310 ms
Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading
Reduce JavaScript execution time 5.4 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this
Keep request counts low and transfer sizes small 107 requests • 904 KiB
To set budgets for the quantity and size of page resources, add a budget.json file
Network Round Trip Times 0 ms
Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance
Total Blocking Time 2,330 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds
Avoid long main-thread tasks 20 long tasks found
Lists the longest tasks on the main thread, useful for identifying worst contributors to input delay
Server Backend Latencies 0 ms
Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance
Speed Index 6.1 s
Speed Index shows how quickly the contents of a page are visibly populated
Avoid an excessive DOM size 1,121 elements
A large DOM will increase memory usage, cause longer [style calculations](https://developers.google.com/web/fundamentals/performance/rendering/reduce-the-scope-and-complexity-of-style-calculations), and produce costly [layout reflows](https://developers.google.com/speed/articles/reflow)
Avoids enormous network payloads Total size was 904 KiB
Large network payloads cost users real money and are highly correlated with long load times
User Timing marks and measures 4 user timings
Consider instrumenting your app with the User Timing API to measure your app's real-world performance during key user experiences
Reduce unused CSS Potential savings of 55 KiB
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity
Efficiently encode images Potential savings of 25 KiB
Optimized images load faster and consume less cellular data
Tap targets are not sized appropriately 98% appropriately sized tap targets
Interactive elements like buttons and links should be large enough (48x48px), and have enough space around them, to be easy enough to tap without overlapping onto other elements
Reduce initial server response time Root document took 930 ms
Keep the server response time for the main document short because all other requests depend on it
Minimize main-thread work 8.9 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
Time to Interactive 11.1 s
Time to interactive is the amount of time it takes for the page to become fully interactive
Serve static assets with an efficient cache policy 57 resources found
A long cache lifetime can speed up repeat visits to your page

Speed And Optimization Tips

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Alexa Rank

37

Global Rank

3

Japan
Traffic
Search

Domain Available

Domain (TDL) and Typo Status
yahoo.co.co Available Buy Now!
yahoo.co.us Available Buy Now!
yahoo.co.com Already Registered
yahoo.co.org Already Registered
yahoo.co.net Available Buy Now!
yhoo.co.jp Available Buy Now!
bahoo.co.jp Available Buy Now!
hahoo.co.jp Available Buy Now!

Information Server

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