When to use けど vs もっとも?


Is there any nuance between these? From looking up the definitions, they seem
similar in meaning (but, although).

Here's a sentence I found that uses both:

もっとも今年の夏は、どこも暑いらしいけど。




An English equivalent of もっとも would be something like "That being said, it
should be noted that ～". もっとも is a stilted expression, and it's not common in
speech. Small children almost never use it!

Besides, もっとも is used exclusively for adding some precondition, exception,
limitation and such. To say very verbosely, もっとも gives off a nuance like "My
previous statement is basically true, but should be interpreted taking the
following into consideration; ...".

  * ✅ 悪いですけど、来週のパーティーには行けません。  
I'm afraid to say this, but I cannot go to the party next week.

  * ❌ 悪いです、もっとも明日のパーティーには行けません。
  * ✅ 今日は雨が降っています。けど、明日は晴れるといいですね。  
It's raining today. But I hope it'll be sunny tomorrow.

  * ❌ 今日は雨が降っています。もっとも、明日は晴れるといいですね。




An English equivalent of もっとも would be something like "That being said, it
should be noted that ～". もっとも is a stilted expression, and it's not common in
speech. Small children almost never use it!

Besides, もっとも is used exclusively for adding some precondition, exception,
limitation and such. To say very verbosely, もっとも gives off a nuance like "My
previous statement is basically true, but should be interpreted taking the
following into consideration; ...".

  * ✅ 悪いですけど、来週のパーティーには行けません。  
I'm afraid to say this, but I cannot go to the party next week.

  * ❌ 悪いです、もっとも明日のパーティーには行けません。
  * ✅ 今日は雨が降っています。けど、明日は晴れるといいですね。  
It's raining today. But I hope it'll be sunny tomorrow.

  * ❌ 今日は雨が降っています。もっとも、明日は晴れるといいですね。

