From JR Shibukawa Station you lot tin give the axe accept a local autobus to Ikaho Onsen.  
Pole #3 together with #4 are 2 buses that'll larn you lot there.  But based on my ain experience the best alternative would live to merely accept a taxi together with salve yourself time.   Just split upwards the fare betwixt 2 or to a greater extent than people at to a greater extent than or less 1500 yen each.   The get-go fourth dimension I came hither was past times car together with think that is even thence  the best way to move anywhere inwards Gunma Prefecture.   
Pole #3 together with #4 are 2 buses that'll larn you lot there.  But based on my ain experience the best alternative would live to merely accept a taxi together with salve yourself time.   Just split upwards the fare betwixt 2 or to a greater extent than people at to a greater extent than or less 1500 yen each.   The get-go fourth dimension I came hither was past times car together with think that is even thence  the best way to move anywhere inwards Gunma Prefecture.   
If you lot are looking for attractions, aside from the dairy farm together with petting zoo , thence I don't recommend Ikaho.  The  sort of people who come upwards hither are one-time timers together with people similar me who are actually into natural hot spas together with greenery.    This is the brain allure of visiting Ikaho, is that at that spot are thence many natural hot jump baths.   The argue it's my minute fourth dimension hither is because of merely that purpose alone, together with it's been 5 years since I was at that spot last.   Getting at that spot is tough on the knees.    The local autobus volition drib you lot off at Ikaho autobus stop.   From at that spot you'll receive got to hike upwards a real long rock stairway.   
 By the fourth dimension you lot accomplish the top where the  shrine is located, your legs volition experience similar rubber.   After offering a pray to the local gods, I turned to a greater extent than or less together with took inwards the reckon patch taking some dainty deep breathes.
Along the rock stairways together with all along narrow passage ways you'll honour shops selling everything from manju to tea.  Manju is a sweetness glue filled cake, you lot tin give the axe honour them all over Japan.   The only affair Gunma is actually famous for is peachy miso together with yakimanju, inwards my humble opinion, but I am certain some smart-ass knows better.  
The H2O is naturally a brownish-yellowish coloring because of the atomic position out 26 together with calcium deposits naturally works life inwards the water.   No artificial chemicals are added together with it's uncirculated water, which way that fresh H2O comes inwards together with the one-time H2O flows out.   Left one-half is hot water, together with the correct side is warm water.   Entrance fee is 800 yen person.    
Note:  There are many hot spas on the way upwards to this onsen.   All of the H2O is good.   There are no bad choices.  However, to brand the hike all the way upwards to this onsen inwards the movie is good worth it.   You volition definitely experience an authentic Japanese way onsen hot spa.