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Precautions and prohibitions for Ad Insertion
Rules for Using Characters and Symbols

1. Ad Insertion Rules

TextNumber of charactersUp to 25 characters
How to CountCount as 2 both for full-width char and half-width Katakana char, count as 1 for half-width alphanumeric
Number of supported symbolsUp to one symbol character of the same type. Only quotation marks can be used up to one pair.


2. Supported character types, space type and Symbol types


Supported Character Types

HiraganaDouble byte
KatakanaDouble byte
AlphanumericDouble byte/Single byte

Supported Space Type

SpaceSingle byte

Supported Symbol Types

Parentheses( ) (Double byte)
( ) (Single byte)
Quotation mark‘’`´ “ ” (Double byte) " ' (Single byte)
Punctuation mark。 、 (Double byte)
Middle dot・ (Double byte)
Comma, (Double byte) , (Single byte)
Dot. (Double byte). (Single byte)
Wave dash〜(Wave dash, Double byte)*Unicode: U+301C
~(Tilde, Double byte)*Unicode: U+FF5E
Percent% (Double byte) %(Single byte)
Ampersand& (Double byte) &(Single byte)
Colon/semicolon: ; (Double byte)
: ; (Single byte)
Three dot leader… (Double byte)
Hyphen‐ (Double byte) - (Single byte)
Operator+ - ± × ÷ = ≠ ∞ (Double byte)
- +(Single byte)
Slash/ (Double byte)
/(Single byte)
Question/exclamation mark? ! (Double byte)
? ! (Single byte)
Other¥ @ # ♯ (Double byte)
¥ @ # $(Single byte)
Greek /Cyrillic charactersΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥΦΧΨΩ (Double byte)
αβγδεζηθικλμνξοπρστυφχψω (Double byte)
абвгдеёжзийклмнопрстуфхцчшщъыьэюя (Double byte)

*No limit in number of punctuation marks, middle dots, commas, and periods.