banmen wo kakuninsuru.

盤面 is read ばんめん.

It literally means the surface of a board, but in many contexts it also means the state or position on the board. So in games like shogi, chess, or go, it often refers not just to the physical board itself, but to the current arrangement of pieces or stones.

So depending on context, 盤面を確認する can mean things like:

• check the board
• check the board position
• check the current game state on the board

を marks the direct object of the verb.

In this sentence, the thing being checked is 盤面, so it takes を:

• 盤面 = the board / board position
• を = object marker
• 確認する = to check / confirm

So the structure is:

• 盤面を確認する
• check the board position

A natural way to think about it is: What is being checked?
Answer: 盤面.

確認する is a suru-verb meaning to confirm, to check, or to verify.

It is made from:

• 確認 = confirmation / checking
• する = to do

So together, 確認する literally means to do a confirmation/check, but in natural English it is usually just to check or to confirm.

Compared with 見る, 確認する sounds more deliberate and purposeful. It suggests checking carefully rather than simply looking.

The dictionary form 確認する is often used in:

• headings
• instructions
• manuals
• notes
• step-by-step procedures
• neutral descriptions of actions

So 盤面を確認する。 can sound like:

• an instruction: Check the board position.
• a procedural step: Check the board.
• a plain statement of an action

If you wanted a polite sentence in conversation, you could say:

• 盤面を確認します。

If you wanted a direct command, you might say:

• 盤面を確認して。 = Check the board.
• 盤面を確認してください。 = Please check the board.

Yes. This is very normal in Japanese.

Japanese often leaves out the subject when it is obvious from context. So the sentence does not explicitly say:

• I check the board
• you check the board
• someone checks the board

Instead, the listener or reader understands that from the situation.

Depending on context, 盤面を確認する。 could mean:

• I check the board.
• Check the board.
• One checks the board.
• We will check the board.

Japanese relies heavily on context, so missing subjects are extremely common.

Most commonly, 盤面 is used for things that have a board-like playing surface, especially in games.

Typical examples include:

• shogi
• go
• chess
• mahjong displays in some contexts
• game analysis of positions

In many cases, it refers less to the physical wood or surface and more to the arrangement on it.

So in game-related Japanese, 盤面 often feels closer to:

• board position
• position
• game state on the board

rather than just board surface.

It is pronounced:

ばんめん を かくにんする

Breaking it down:

• 盤面 → ばんめん
• を → usually pronounced o
• 確認する → かくにんする

So in smooth speech:

ばんめんをかくにんする

Yes, you could, but the nuance is different.

• 盤面を見る = look at the board
• 盤面を確認する = check the board / verify the board state

見る is more general and basic. It just means to look at or to see.

確認する suggests:

• checking carefully
• making sure something is correct
• verifying the situation

So if someone is analyzing a position or making sure they understand the current state, 確認する is often a better fit.

The dictionary form in Japanese is often called the non-past form. That means it can refer to:

• present habitual action
• future action
• a general statement
• an instruction-like action

So 盤面を確認する。 does not by itself tell you whether it means:

• check the board now
• will check the board
• checks the board
• the step is to check the board

You understand the exact time from context.

If you wanted to make it explicitly past, you would say:

• 盤面を確認した。 = checked the board

In Japanese, this is perfectly natural. A dictionary-form verb can end a sentence normally.

English learners sometimes expect something like:

• I check the board.
• Please check the board.

But Japanese does not need to spell that out. A plain-form verb can stand alone as a full sentence.

So 盤面を確認する。 is not an incomplete fragment in Japanese. It is a normal sentence, especially in written instructions, narration, or notes.