Translation guide
The English word 'series' covers a range of meanings from TV shows and book collections to sequences of events. Japanese uses different words depending on what kind of series you mean.
A set of television or radio programs with the same characters or theme, broadcast regularly.
The most common and versatile loanword for any kind of series, including TV dramas, anime, and book series.
このドラマのシリーズはとても人気があります。
This drama series is very popular.
Specifically a TV drama series that airs consecutive episodes, often weekly. More formal than シリーズ.
新しい連続ドラマが始まります。
A new drama series is starting.
A set of books, novels, or manga published sequentially, often with a continuing story.
Works for any published series. Very common.
この小説は三部作のシリーズです。
This novel is part of a three-part series.
Emphasizes that something belongs to a series, often used for books, movies, or products.
A number of events or actions happening one after another.
Means 'a series of' or 'a string of', used for events, incidents, problems, etc. Often used in news.
一連の事件について警察が調査しています。
The police are investigating the series of incidents.
Means 'consecutive' or 'successive', often used as a prefix or in compounds like 連続殺人 (serial murders).
連続して事故が起きた。
A series of accidents occurred.
Can be used for events, but sounds slightly more like a planned set rather than random occurrences.
A group of related products released under a common name, like a car series or a limited edition series.
Standard for product lines, model series, etc.
この車は新しいシリーズの一部です。
This car is part of a new series.
A sum of a sequence of terms in mathematics.
The technical term for a mathematical series.
無限級数の和を求めなさい。
Find the sum of the infinite series.
シリーズ is a loanword and feels more like a branded or planned set (TV series, book series, product line). 連続 emphasizes things happening one after another without a gap, often used for events or actions (連続ドラマ is an exception, meaning a serial drama). Use 一連の for 'a series of' when describing a string of related incidents or problems.
一連のミスでプロジェクトが遅れた。
A series of mistakes delayed the project.
While シリーズ is widely understood, using it for a series of natural events (like earthquakes) can sound odd. Use 一連の or 連続 instead.
I've read all of this author's series.
その講演会はシリーズで行われます。
The lecture series will be held as a series.