Guide: How to say “plus one” in Japanese

Learning how to say “plus one” in Japanese can be useful when navigating social situations, discussing numbers, or conveying the concept of addition. In this guide, we will explore both formal and informal ways to express this phrase, highlighting regional variations when necessary. With a warm tone, we will provide tips and examples to help you understand and use these phrases in context.

Formal Ways to Say “Plus One”

When speaking formally or in professional settings, it is essential to use appropriate language. Here are four formal ways to say “plus one” in Japanese:

1. 1. Purasu ichi (プラス一)
   This is the most straightforward and widely-used formal phrase for “plus one” in Japan. The “purasu” comes from the English word “plus,” while “ichi” means “one” in Japanese. For example, you can say, “Gyūnyū ga sambon, purasu ichi kudasai” (Please give me three bottles of milk, plus one).
2. 2. Ichi fuyō (一付属)
   “Ichi fuyō” literally translates to “one addition” or “one attachment” and serves as a formal alternative to “plus one.” This phrase is commonly used when adding options or extras to an existing order. For example, you can say, “Denshiken ni ichi fuyō kudasai” (Please add one electrical outlet).
3. 3. Ichi o tsuika shimasu (一を追加します)
   This phrase explicitly means “add one” and is suitable for formal or written situations. For instance, you can use it when filling out forms or applications that require additional information. For example, you can say, “Namae no mae ni misete kudasai, ichi o tsuika shimasu” (Please show your name and add one).
4. 4. Ichi o kuwae te kudasai (一を加えてください)
   “Ichi o kuwae te kudasai” is another formal way to say “add one” or “include one.” This phrase is useful in formal requests or when specifying the quantity of items required. For instance, you can say, “Hikidemono o ikko (ichi o kuwae te) kudasai” (Please give me one souvenir).

Informal Ways to Say “Plus One”

When speaking with friends, family, or in casual situations, you can use more colloquial expressions to convey the concept of “plus one.” Here are four informal ways to express “plus one” in Japanese:

1. 1. Purasu wan (プラスワン)
   Similar to the formal phrase, “purasu wan” is the most commonly used informal way to say “plus one.” This phrase is widely understood in casual conversations or among friends. For example, you can say, “Kenshūchū ni ikko purasu wa nani ga ii?” (What would be good as a plus one during training?).
2. 2. Ichi tsuika (一追加)
   “Ichi tsuika” translates to “one addition” and is suitable for both spoken and written informal language. This phrase is versatile and can be used in various contexts. For instance, you can say, “Sukinamono o hitotsu tsuika shimasu” (Add one of your favorite items).
3. 3. Ichi o kuwaeru (一を加える)
   “Ichi o kuwaeru” carries the meaning of “adding one” and is used when referring to adding something to an existing item or group. This phrase is less common but still understandable in informal settings. For example, you can say, “Nakayoshi ni ichi o kuwaete iidesu ka?” (Can I add one more friend?).
4. 4. Ichi o kuwashiku (一を加わしく)
   “Ichi o kuwashiku” is an informal way of saying “add one” and is often used among friends or in casual discussions. It implies a sense of informality and is not suitable for professional or formal environments. For instance, you can say, “Takai no wa bettā desu ne. Ichi o kuwashiku torimashō” (The high one is better, right? Let’s add one to it).

Example Usage

To further enhance your understanding of how to say “plus one” in Japanese, here are a few examples that illustrate the application of these phrases:

Formal: Kono shiryō o mite, ichi o tsuikashimashō. (Let’s add one after reviewing this document.)

Informal: Ashita no pātī ni ikko purasu wa yoi? (How about a plus one for tomorrow’s party?)

Remember that context is essential when using these phrases. Pay attention to the tone and the formality of the situation to choose the most appropriate expression.

Final Thoughts

Congratulations! You have now learned various ways to say “plus one” in Japanese. Whether you find yourself in a formal or informal setting, with friends or business associates, you can confidently convey the concept of addition. Remember to tailor your choice of expression based on the context and the level of formality necessary. With these phrases and examples, you can comfortably navigate discussions involving numbers and additions in Japanese.

Keep practicing and incorporating these phrases into your conversations. Learning a language is an ongoing journey, and with each step, you become more proficient and confident in your communication skills.