hannitikage ha warui to iu wake de mo nai.

As a set phrase, X というわけでもない means something like:

• it is not that X
• it is not exactly the case that X
• it is not necessarily true that X

So here, the speaker is not bluntly saying partial shade is good. They are more carefully saying that the idea partial shade is bad is not really correct, or not fully correct.

Not in a literal, everyday someone said it sense.

Here, と marks the content of a statement or judgment, and いう helps package that content as an idea. So 悪いというわけでもない is like saying:

• the conclusion that it is bad is not really the case
• it is not that one would say it is bad

A natural English way to understand it is just it is not that it is bad.

わけ often means something like reason, circumstance, meaning, or the conclusion you arrive at.

In this grammar pattern, it does not mean a simple concrete reason. It is closer to:

• the case
• the conclusion
• the interpretation

So 悪いというわけでもない means it is not really the case that it is bad.

Both わけではない and わけでもない are common and very similar.

A rough difference is:

• わけではない = straightforward it is not that...
• わけでもない = often a little softer or more contrastive, like it is not necessarily that... or it is not exactly that either

The も here is not a simple also in the usual sense. It adds nuance and softens the denial.

So 悪いというわけでもない feels slightly less direct and a little more nuanced than a plain 悪いというわけではない.

Not exactly.

• 半日陰は悪くない = partial shade is not bad
• 半日陰は悪いというわけでもない = it is not really the case that partial shade is bad or partial shade is not necessarily bad

The second one is more indirect and cautious. It often suggests:

• the speaker is responding to an assumption
• the issue is more nuanced
• they are rejecting a strong negative judgment, but not necessarily giving strong praise

So 悪くない sounds more direct. 悪いというわけでもない sounds softer and more qualified.

What is being negated is the idea or claim partial shade is bad.

That means the sentence does not automatically say:

• partial shade is good
• partial shade is the best
• partial shade is ideal

It only says that calling it bad is not quite right.

This is a very common Japanese way of avoiding an overly strong statement.

Because 悪い is an い-adjective, and い-adjectives can already function as predicates by themselves.

So:

• 悪い is already a complete plain-form predicate
• that is why 悪いという is fine

By contrast, with a noun or a な-adjective, you normally need だ before という:

• 便利だというわけではない
• 学生だというわけではない

So 悪いだという would be incorrect.

Inside the idea being discussed, は marks 半日陰 as the topic.

So the underlying thought is basically:

• as for partial shade, it is bad

And then the speaker denies that judgment with というわけでもない.

Using は can also give a contrastive feeling, like the speaker is talking specifically about partial shade as opposed to some other condition, such as full sun or full shade.

Very possibly, yes.

This pattern often appears when the speaker is pushing back against a belief, assumption, or oversimplified conclusion. The nuance can be something like:

• I would not go so far as to call it bad
• that is not quite the right way to put it
• it is more complicated than that

So it can sound as if someone has suggested partial shade is bad, and the speaker is correcting that gently.

Yes, you can, and it sounds natural.

• 悪いわけでもない
• 悪いというわけでもない

Both are used.

The version with という makes the judgment sound a bit more like an explicit idea or statement being evaluated. It can feel slightly more explanatory or slightly more formal. The version without という is a bit more direct and compact.

Yes. It is the same verb.

However, in grammar patterns like という, Japanese often writes it in hiragana as いう, especially when it is functioning more like a grammatical connector than a full lexical verb with strong literal meaning.

So:

• というわけでもない
• と言うわけでもない

Both can appear, but というわけでもない is very common and looks more natural in many contexts.

This sentence is in plain style, but it is not rough. It is neutral and very common in both speech and writing.

A polite version would be:

• 半日陰は悪いというわけでもありません。
• 半日陰は悪いわけでもありません。

The plain version already sounds fairly soft because of the grammar pattern itself, so even without polite endings it does not sound harsh.