What it means
ばかりか means “not only A, but also B.” It presents B as an additional fact, often one that is more surprising, extreme, or impressive than A. It can attach to nouns, な-adjectives with な, い-adjectives, and plain-form verbs. The construction is commonly followed by も, まで, or さえ in the second part, although these are not mandatory.
Usage note
ばかりか is neutral and can be used in both familiar and polite sentences, but the sentence ending determines the overall register. Do not confuse it with ばかり meaning “just” or “only”; ばかりか specifically adds another fact rather than limiting the meaning.
How to use it
この図書館は本ばかりか、雑誌も無料で借りられます。
At this library, not only books but also magazines can be borrowed for free.
彼は親切なばかりか、仕事も速いです。
He is not only kind, but he also works quickly.
この製品は軽いばかりか、丈夫です。
This product is not only light but also durable.
彼女は日本語を話せるばかりか、漢字も読めます。
She can not only speak Japanese but also read kanji.
この図書館は本ばかりか、雑誌も無料で借りられる。
At this library, not only books but also magazines can be borrowed for free.
彼は親切なばかりか、仕事も速い。
He is not only kind, but he also works quickly.
この製品は軽いばかりか、丈夫だ。
This product is not only light but also durable.
彼女は日本語を話せるばかりか、漢字も読める。
She can not only speak Japanese but also read kanji.
Example sentences
この電車は駅に止まるばかりか、車内で自転車も運べます。
This train not only stops at stations, but can also carry bicycles inside.
この博物館では、子ども向けの展示があるばかりか、専門家にも役立つ資料まで来館者に配布しています。
This museum not only has exhibits for children, but also distributes even materials useful to specialists to visitors.