Signed by governor today (this news story was written before he signed) and goes into effect July 1, 2016. Note: Idaho already has permitless open carry.
So that's nine states now with permitless carry, and no doubt the results in Idaho and West Virginia will be the same as the other permitless carry states: no adverse events. No people shooting each other over fender benders and parking spots. No "blood in the streets". None of the calamitous horrors shouted in dire warnings by the Bloomberg Demanding Moms (who waged a large well-funded campaign in Idaho).
What I don't understand is what it is that the legislators and law enforcement officers of Hawaii know about the people of Hawaii that leads them to believe that the law-abiding people here are dangerous irresponsible incompetents who couldn't safely handle the responsibility of carrying weapons in public. I've actually written a number of Hawaii legislators and asked them that question. Haven't heard back from a single one of them. Maybe it's just "Guns = Bad", "Guns in public = Really Really Bad!".
Almost all the rest of the country is heading in one direction, Hawaii in the other. Lucky we live Hawaii (?).

In the excerpt below I've included the paragraph about the others "arms"/"weapons" allowed to be carried concealed without a permit. Yea for knife rights! Yea for stun gun, taser, expandable baton, etc. rights!
http://www.thenewamerican.com/usnews/constitution/item/22851-idaho-makes-9-gem-state-joins-8-constitutional-carry-statesIdaho Makes 9 — Gem State Joins 8 Constitutional Carry States
The movement to enact “constitutional carry” of weapons has added another notch to the growing list of states that do not require a permit for individuals to carry concealed weapons.
On March 21, the Idaho legislature sent Governor C.L. “Butch” Otter legislation that would make the Gem State the ninth U.S. state to acknowledge that individuals have a natural right “to keep and bear arms,” and do not need a permit or license from the government to carry concealed weapons. Senate Bill 1389 passed the Idaho Senate by a vote of 27 to 8 on March 16 and then passed the House on March 18 by a vote of 54 to 15.
The new Idaho legislation also provides that persons between the ages of 18 and 21 may apply for a concealed weapon license, and the sheriff of the county in which that individual resides “shall issue” the license, if the person meets the other requirements of the law. Unlike some state concealed carry weapon (CCW) laws, SB 1389 does not restrict “deadly weapons” to firearms. It also allows concealed carry of “any dirk, dirk knife, bowie knife, dagger or firearm,” as well as “any other weapon, device, instrument, material or substance that is designed and manufactured to be readily capable of causing death or serious bodily injury.”
The other eight states that recognize “permitless,” “constitutional,” or “unrestricted” carry of concealed weapons are Alaska, Arizona, Arkansas, Kansas, Maine, Vermont, West Virginia, and Wyoming. March has proven to be a banner month for constitutional carry advocates, with the West Virginia legislature passing a bill similar to Idaho’s earlier in the month, and then decisively overriding Governor Earl Ray Tomblin’s veto of the legislation. Legislative efforts to pass constitutional carry laws are underway in nearly two dozen additional states.