You walk to Hirosaki station and take a train to either Shin Aomori station or Aomori Station, depending on time and day, and from either one you can get a JR bus. Probable journey time about 3hrs 45mins to 4hrs. Otherwise you can rent a car and be there in 1 and a half to 2 hrs.

I was there last year mid September. Still lush green. Beautiful but green! I think it is better in October if you want to see red leaves. Transportation in and out of the area, you need to check what mode of transport and its frequency, and how long you want to want around there. It would be very rushed if you have to be in and out within a day unless you are driving.

I was there in Sep 2019, as there is a busy road alongside the stream and not that isolated, I didn't see much wildlife at all, let alone bears! Not a drop of rubbish or leftover food was spotted the entire time I was there, so, chances of encountering bears are minimal. If you want to see them in the wild, I think you need to go further into the national park.

As I know,It is no reservation for JR bus.

小型犬であれば大丈夫です。前回もつれている人を見ましたよ。

It will be colored at Oct.

8月は相当暑いと思います。渓流沿いで日陰とはいえ、気温そのものは高いし、歩いたり自転車に乗ったりするのでしょうから、半そでがベストですが、虫対策などをお考えの場合は薄手の長そでシャツ１枚で十分です。ボトムズもそれに準じて考え、半ズボンがよいでしょう。（やはり虫対策をされるのなら涼しい素材の長ズボンも可です。）スカートは避けましょう。足元は歩きやすい運動靴やスニーカーがよいでしょう。帽子もかぶった方がよいでしょう。

Oirase Mountan Stream is just a stream leading to Towada Lake and being a very popular walking trail for visitors both local and overseas. There is a vehicular road by the side of the stream with onsen hotels located on certain spots. Scenic sights can easily be found on both sides of the stream particularly relating to running water and different sized waterfalls. The whole stream of about 1.6 KM long is open to public free but there will be traffic jams on the way during autumn period when the drivers drop down their cars and take photos on the way with multi-colored tree-leaves alongside the route.

As far as I know, the easiest way from Hirosaki to Oirase is by way of JR. Take the early local train from Hirosaki JR Station to Aomori JR Station. The terminal of JR bus to Oirase is just in front of Aomori JR Station. I do not recommend you to take the bus at Shin Aomori JR station because this is the second bus stop of the route. During rush period in spring time, you can only secure a seat at Aomori Station (first bus stop of the bus route to Oirase). Have a nice trip but do check the time table for the bus route so as to adjust your time to take the train from Hirosaki.