Precautions
Precautions and prohibitions for Ad Insertion
Information Icons
Display Assured Environments (Display Ads (Guaranteed))
Video Player Specifications (PC)
Display Ads (Guaranteed) 
*Display Ads (Guaranteed) is available for specific advertisers.
Please refer to this page for details about Display Ads (Guaranteed) packages.
Editorial Review
Initial request for pre-review must be made at least 11 business days prior to the start date. Submit from the Pre-Review consulting form for Display Ads (Guaranteed).
Top Impact Square
Required/ Optional
Item
Description
ー
Ad type
Top Impact Square
Required
Image
(1)Main
Aspect ratio
Recommended
For devices with high-resolution displays, we recommend creating the following recommended sizes (or larger).
Recommended pixel size
(width x height)
(Minimum pixel size)
1:1
1200pixel x 1200pixel
(600pixel x 600pixel)
File size
(Max size per file)
Recommended: Up to 150 KB (Max 3MB)
Note
*Files 150 KB or more, or either the width or length exceeds 2000px, are compressed when uploading.
If the compressed file is larger than 150KB, an error will occur and uploading will fail.
(2) Center image
(3) Right-side image
(4) Left-side image
Pixel size
（width × height）
(2) Center image：450pixel×50pixel
(3) Right-side image：170pixel×1024pixel
(4) Left-side image：170pixel×1024pixel
File size
Maximum of 3MB for each image (2) to (4)
Cautions
Files 150 KB or more, or either the width or length exceeds 2000px, are compressed when uploading.
If the compressed file is larger than 150KB, an error will occur and uploading will fail.
File format
GIF 89a、JPEG、PNG
Animation
Not available
Alt text (ALT aspect)
Not available
Required
Final URL
Link destination
1 location　
Link destination after click is the same for (1) to (4)
Number of characters
Up to 1024 characters
Supported characters
Single byte alphanumeric characters (RFC3986 and {}) * [] cannot be used.
Cautions
URLs beginning with a “.” (dot) cannot be used.
You cannot register URLs deviating to RFC3986, such as URLs including Japanese characters.
ー
Display URL
Automatically generated from the set final URL.
Optional
Tracking URL
URLs
1 URL
Number of characters
Up to 1024 characters
Supported characters
Single byte alphanumeric characters (RFC3986 and {}) * [] cannot be used.
Cautions
URLs beginning with a “.” (dot) cannot be used.
You cannot register URLs deviating to RFC3986, such as URLs including Japanese characters.
Note
Don't use deep linking. It may not work correctly.
Optional
Custom parameter
Name
Number of characters
Up to 16 characters
Supported characters
Single byte alphanumeric characters
Value
Number of characters
Up to 200 characters
Supported characters
Single byte alphanumeric characters (RFC3986 and {}) * [] cannot be used.
Disclaimer
* A frame containing a notification to the user may be posted at the top of the search window in the event of a disaster or service issue. When this frame is posted, the side banners will be hidden. The "広告を再表示(View again)" link will not appear.
* Depending on the specification changes of browser or OS updates and user preferences, the display may be as follows.
　- (3)Right-side image and (4)Left-side image won’t be displayed or a part of the image won’t be displayed
　- Won't enable display of the area on the left side of the content column by scrolling.
* For PC specified packages, ads may be delivered to devices other than PC depending on the target OS and device. In this case, the left and right side images will be hidden.
Ad Expression Restrictions
*You are not allowed to appeal price for promotions related to health appliances, food products labeled functionality, food with nutrient function claims, food for specified health use, and other health foods and cosmetics that we accept for posting.
【Common restrictions for (1)Main, (2)Center image, (3)Right-side image, (4)Left-side image】
* Input the items required to be described in (1)Main or (2)Center image.
　 Example: name of sponsor, alcoholic beverages (e.g. text stating that "Alcoholic beverages are only for those over 20 years old,") etc.
* Do not state the required items set in "Restrictions on Expressions in Advertisements" section in Chapter 9 of the "Yahoo! JAPAN Advertisement Editorial Guidelines" at the top-right corner (Width17px × length15px) of (1)Main.
*Learn more about restricted expressions and prohibited panel expression areas from "Cautions/Ad behavior".
Top Impact Square Video
Required/ Optional
Item
Description
ー
Ad type
Top Impact Square Video
Required
Video
Aspect ratio
(1)Main: 1:1
Pixel size
（width × height）
(1)Main: Minimum 600pixel×600pixel
File size
Within 200MB
Cautions
The file will be compressed to applicable size for ad deliveries.
Audio codec
AAC LC
　
Video codec
H.264, H.265
File format
MP4, MOV
Minimum video bit rate
(recommended value)
1Mbps or more
Minimum audio bit rate
(recommended value)
128kbps or more
*If audio bit rate is 0kbps, the video is recognized as without audio.
Play time
From 5 sec. (Min.) to 60 sec. (Max.)
Required
Video thumbnail image

※A static image to be displayed for users before video playback.
(1) Main （Video thumbnail image）
Aspect ratio
Recommended
For devices with high-resolution displays, we recommend creating the following recommended sizes (or larger).
Recommended pixel size
(width x height)
(Minimum pixel size)
1:1
1200pixel x 1200pixel
(600pixel x 600pixel)
File size
(Max size per file)
Recommended: Up to 150 KB (Max 3MB)
Note
*Files 150 KB or more, or either the width or length exceeds 2000px, are compressed when uploading.
If the compressed file is larger than 150KB, an error will occur and uploading will fail.
(2) Center image
(3) Right-side image
(4) Left-side image
Pixel size
（width × height）
(2) Center image：450pixel×50pixel
(3) Right-side image：170pixel×1024pixel
(4) Left-side image：170pixel×1024pixel
File size
Maximum of 3MB for each image (2) to (4)
Cautions
Files 150 KB or more, or either the width or length exceeds 2000px, are compressed when uploading.
If the compressed file is larger than 150KB, an error will occur and uploading will fail.
File format
GIF 89a、JPEG、PNG
Animation
Not available
Alt text (ALT aspect)
Not available
Required
Final URL
Link destination
1 location　
Link destination after click is the same for (1) to (4)
Number of characters
Up to 1024 characters
Supported characters
Single byte alphanumeric characters (RFC3986 and {}) * [] cannot be used.
Cautions
URLs beginning with a “.” (dot) cannot be used.
You cannot register URLs deviating to RFC3986, such as URLs including Japanese characters.
ー
Display URL
Automatically generated from the set final URL.
Optional
Tracking URL
URLs
1URL
Number of characters
Up to 1024 characters
Supported characters
Single byte alphanumeric characters (RFC3986 and {}) * [] cannot be used.
Cautions
URLs beginning with a “.” (dot) cannot be used.
You cannot register URLs deviating to RFC3986, such as URLs including Japanese characters.
Note
Don't use deep linking. It may not work correctly.
Optional
Custom parameter
Name
Number of characters
Up to 16 characters
Supported characters
Single byte alphanumeric characters
Value
Number of characters
Up to 200 characters
Supported characters
Single byte alphanumeric characters (RFC3986 and {}) * [] cannot be used.
Disclaimer 
* A frame containing a notification to the user may be posted at the top of the search window in the event of a disaster or service issue. When this frame is posted, the side banners will be hidden. The "広告を再表示(View again)" link will not appear.
* Depending on the specification changes of browser or OS updates and user preferences, the display may be as follows.
　- (3)Right-side image and (4)Left-side image won’t be displayed or a part of the image won’t be displayed
　- Won't enable display of the area on the left side of the content column by scrolling.
* For PC specified packages, ads may be delivered to devices other than PC depending on the target OS and device. In this case, the left and right side images will be hidden.
Ad Expression Restrictions 
*You are not allowed to appeal price for promotions related to health appliances, food products labeled functionality, food with nutrient function claims, food for specified health use, and other health foods and cosmetics that we accept for posting.
【Common restrictions for (1)Main, (2)Center image, (3)Right-side image, (4)Left-side image】
* Input the items required to be described in (1)Main (Video thumbnail) or (2)Center image.
　 Example: name of sponsor, alcoholic beverages (e.g. text stating that "Alcoholic beverages are only for those over 20 years old,") etc.
* Do not state the required items set in "Restrictions on Expressions in Advertisements" section in Chapter 9 of the "Yahoo! JAPAN Advertisement Editorial Guidelines" at following areas.
　（1）Information Icon （Width 17px × Height 15px）
　（2）“もう一度見る (View again)” button (Width 98px × Height 20px）
*Learn more about restricted expressions and prohibited panel expression areas from "Cautions/Ad behavior".
Cautions/Ad behavior
Prohibited (3)Right-side image, (4)Left-side image Expression Areas
You can‘t use the following expressions in the width 170px × height 100px area because they give a false idea of collaborating with Yahoo! JAPAN when the header area, right side image(3), and left side image(4) is placed aligned.
* Logos of company names, brand names, product names, service names or promotion names.
* Text information (Letters contained in photos or images of products, people, etc.)
* Photos and illustrations of people, characters, etc.
* Photos and illustrations of products, service, etc (permitted when 
　 the expression include only part of the product or service)
Check the examples of expressions in the prohibited expression area.
Ad behavior
*Click the image and it will appear enlarged in a new tab of your browser.