Gohan charges his ki and lets forth a large white barrier to either knock away opponents or deflect attacks.
The user make the barrier bigger as Gohan did during the Broly - Second Coming though maintaining it requires extra ki.
Usage and Power
The first instance of Gohan using this technique was in Dragon Ball Z: Broly - Second Coming when he battled the maniacal Legendary Super Saiyan Broly. When the villain fired an Eraser Cannon at Gohan, he tried to deflect it into the air but it followed him back down again. Trying to stop the attack, Gohan used his Tenma Defense to stop the attack and defend his friends.
Future Gohan uses a similar technique in Dragon Ball Z: The History of Trunks though he does not increase the barrier's size like his present counterpart.
Video Games Appearances
In Dragon Ball Z: Budokai Tenkaichi 3, Future Gohan uses it in the form of his Evil Barrier which is the Energy Shield he used in The History of Trunks special.
Tenma Defense was named in Battle of Z, where it appears as one of Adult Gohan's special attacks. When the attack is used near a teammate, the teammate is healed as well as himself.
"Create a barrier! Additional input will make the barrier bigger. Hold the button to maintain it while using up Ki."
In Dragon Ball Xenoverse 2, it appears under the name Energy Dome and appears as an Evasive Skill used by Adult Gohan in his Uniform Skillset and by Future Gohan. In Xenoverse 2, it can block ki blast moves and pressing the button again will allow the user to expand the barrier to knock back opponents, while holding it will allow the user to maintain it using ki.
"Creates a barrier that can block Ki Blasts. Pressing the button again expands the barrier. This can be used to knock back opponents in addition to stopping projectiles."
— Dragon Ball Xenoverse 2 Tutorial description
As part of the Masters Pack DLC, the Future Warrior can learn this skill by completing School Lesson 2: "Lesson 2" of Future Gohan's Training. Interestingly, it is referred to as Future Barrier in the plot description of Lesson 2, despite the skill itself appearing under the name Energy Dome in the Lesson's Basic Rewards section.
- In Xenoverse 2 it is revealed that Tenma Defense and Evil Barrier used by Future Gohan in Dragon Ball Z: The History of Trunks and Dragon Ball Z: Budokai Tenkaichi 3 are the same technique as both Future Gohan and Adult Gohan can utilize via the Energy Dome in Xenoverse 2. However when Future Gohan used it in the special he apparently did not expand the barrier like Present Gohan did during his battle with Broly as it is requires extra ki to maintain the larger barrier (it is likely that Future Gohan does not have the same amount of ki reserves as his Present counterpart due to their differences in strength and experience) thus explaining the differences between their usage of what is essentially the same technique.